CA2018443A1 - Imidazolyl-alkenoic acids - Google Patents

Abstract

ABSTRACT OF THE DISCLOSURE
IMIDAZOLYL-ALKENOIC ACIDS

Angiotensin II receptor antagonists having the formula:

Description

r 2~_gl~

IMIDAZOLYL--ALKhrNOIC ACIDS

The present invention relates to new imidazolyl-alkenoic acids which are angiotensin ~I receptor antagonists and are useful in regulating hypertension induced or exacerbated by angiotensin II, and in the treatment of congestive heart failure, renal failure, and 20 glaucoma. This invention also relates to pharmaceutical compositions containing imidazolyl-alkenoic acids and methods for using these compounds as antagonists of angiotensin II, as an~ihypertensive agents and as agents for treating congestive heart failure, renal failure, and glaucoma.

BAC GROUND OF THE INVENTION

The class of peptide pressor hormone known as angiotensin is responsible for a Yasopressor action that is implicated in the etiolo~y of hypertension in man.
- Inappropriate activity of the renin-angiotensin systems appears to be a key element in essential hypertension, '' ~01~

1 congestive heart failure and in some forms of renal disease. In addition to a direct action on arteries and arterioles, angiotensin II (AII), being one of the most potent endogenous vasoconstrictors known, exerts stimula-tion on the release of aldosterone from the adrenalcortex. Therefore, the renin-angiotensin system, by virtue of its participation in the control of renal sodium handling, plays an important role in cardiovascular hemeostasis.
Interruption of the renin-angiotensin system with converting enzyme inhibitors, such as captopril, has : proved ~o be clinically useful in the treatment of hypertension and congestive heart failure (Abrams, W.B., et al., (1984), Federation Proc., 43, 1314). The most . . . _ 15 direct approach towards inhibition of the renin-angiotensin system would block the action of AII at the receptor.
Compelling evidence suggests that AII also contributes to renal vasoconstriction and sodium retention that is characteristic of a number of disorders such as heart 20 failure, cirrhosis and complications of pregnancy (Hollenberg, N.K., (1984), J. Cardiovas. Pharmacol., 6, S176). In addition, recent animal studies suggest that inhibition of the renin-angiotensin system may be beneficial in halting or slowing the progression of chronic renal failure (Anderson, S., et al., (1985), J.
Clin. Invest., 76, 612). Also, a recent patent application (South African Patent Application No.
87/01,653) claims that AII antagonists are useful as agents for reducing and controlling elevated intraocular pressure, especially glaucoma, in mammals.
The compounds of this invention inhibit, bloc~
and antagonize the action of the hormone AII, and are therefore useful in regulating and moderating angiotensin induc~d hypertension, congestive heart failure, renal failure and other disorders attributed to the actions of 1 AII. When compounds o~ this invention are administered to mammals, the elevated blood pressure due to AII is reduced and other manifestations based on AII intercession are minimized and controlled. Compounds of this invention are also expected to exhibit diuretic activity.
Recognition of the importance of blocking and inhibiting the actions of AII has stimulated other efforts to synthesize antagonists of AII. The following references have disclosed imidazole derivatives which are 10 described as having AII blocking activity and useful as hypotensive agents.
Furukawa et al., U.S. Patent 4,340,598 discloses imidazol-5-ylacetic acids imidazol-5-yl-propanoic acids.
Specifically, the disclosure includes l-benzyl-2-n-butyl-15 5-chloroimidazole-4-acetic acid and 1-benzyl-2-phenyl-5-chloroimidazole-4-propanoic acid.
Furukawa et al., U;S. Patent 4,355,040 discloses substituted imidazole-5-acetic acid derivatives. A
compound specifically disclosed is 1-(2-chlorobenzyl)-2-n-20 butyl-4-chloroimidazole-5-acetic acid.
Carini et al., in EP 253,310 disclose certain imidazolylpropenoic acids. Two intermediates described in this patent are ethyl 3-[1-(4-nitrobenzyl)-2-bu-.yl-4-chloroimidazol-5-yl]propenoate and ethyl 3-[2-butyl-4-chloro-1-(4-aminobenzyl)imidazo1-5-yl]propenoate.
Also, Wareing, in PCT/~P 86/00297, discloses as intermediates certain imidazolylpxopenoate compounds. On paye 62, Formula (CX) is ethyl 3-[1-(4-fluorophenyl)-4-isopropyl-2-phenyl-lH-imidazol-5-yl]-2-propenoate.
o 2 {~ ~ 8 ~

The compounds of the present invention that are blockers of angiotensin II receptors are represented by 5 the following Formula (I):

CH2-RCR4=C~ (I) 1 o R2 X~ ~( in which:
R1 is phenyl, biphenyl, naphthyl, or adamantyl-15 methyl, which are unsubstituted or substituted by one tothree substituents selected from Cl, Br, F, I, Cl-C4alkyl, nitro, CO~R , tetrazol-5-yl, Cl-C4alkoxy, hydroxy, SCl-C4alkyl, S02NHR , NHS02R , S03H, CoNR7R7, CN, 2 1 4a kyl~ or CnF2n+l, wherein n is 1-3;
R is C2-ClOalkyl, C3-ClOalkenyl, C3-ClOalkyn C3_6cycloalkyl, or (CH2)0_8phenyl unsubstituted or substituted by one to three substituents selected from Cl-C$alkyl, nitro, Cl, Br, F, I, hydroxy, Cl-C4alkoxy, or NR7R ;
X is a single bond, S, or O;
R3 is hydrogen, Cl, Br, F, I, CHO, hydroxymethyl, CooR7, CoNR7R7, N02, or CnF2n~l, wherein n is 1-3;
R4 and R5 are independently hydrogen, Cl-C6alkyl, phenyl-Y-, naphthyl-Y-, or biphenyl-Y-, wherein the aryl groups are unsubstituted or subs~ituted by one to three substituents selected ~rom Cl, Br, F, I, Cl-C4alkoæy, hydroxy, C02R , CN, N02, tetrazol-5-yl, S03H, CF3, CONR R , S02NHR , Cl-C4alXyl, or NR7R7, or hy methylenedioxy, phenoxy or phenyl, except that R4 and R5 are not both selected from hydrogen or Cl-C6alkyl;

8 ~ t3 1 y is a single bond, O, S, or Cl-C6alkyl which is straight or branched or optionally substituted by phenyl or benzyl, wherein each of the aryl groups is unsubstituted or substituted by halo, NO2, CF3, Cl-C4alkyl, Cl-C4alkoxy, 5 CN, or Co2R7;
R6 is -Z-COOR8 or -Z- CoNR7R7;
Z is a single bond, vinyl, -CH2-O-CH2-, methylene optionally substituted by Cl-C4alkyl, one or two benzyl groups, thienylmethyl, or ~urylmethyl, or -C(O)NHCHR9-, 1~ wherein R9 is H, Cl-C4alkyl, phenyl, benzyl, thienyl-methyl, or furylmethyl;
each R independently is hydrogen, Cl-C4alkyl, or (CH2)mphenyl, wherein m is 0-4; and ~ is hydrogen, Cl-C6alkyl, or 2-di(Cl-C4alkyl)-15 amino-2-oxoethyl; or R5 and R6 are both hydrogen, R4 is -Z-COOR8 and Z
is other than a single bond, or a pharmaceutically accept-able salt thereof.
Preferably, one of R4 and R5 is hydrogen or Cl-C6-20 alkyl.
Preferred compounds of this inven~ion are represented by Formula (I) when:
Rl is phenyl unsubstituted or substituted by one to three ubstituents selected from chloro, fluoro, tri-fluoromethyl, nitro, methyl, methoxy, hydroxy, sulfonamido,carboxy, carboCl-C4alkoxy, carbamoyl, cyano, or tetrazol-5-yl;
X is a single bond;
R2 is C2-C8alkyl;
~ R3 is hydrogen, chloro, fluoro, or trifluoro-methyl;
R4 is hydrogen or Cl-C4alkyl;
R is benzyl unsubstituted or substituted by one to three substituents selected from Cl, Br, F, N02, OCH3, OH, CF3, NR7R7, CH3, or C02R7, or methylenedioxy;

2 ~

1 R6 is COOH;
each R7 independently is H or CH3;
or a pharmaceutically acceptable salt thereof.
The E isomers (trans stereochemistry of the carboxy and imidazole groups) are generally more active and thus, are preferred over the Z isomers (cis).
As used herein, the terms alkyl, alkenyl, alkoxy, and alkynyl mean carbon chains which are branched or unbranched with the length of the chain determined by the 10 descriptor preceding the term.
Particular compounds of the invention include, but are not limited to, the following: -(E)-3-[2-n-butyl-1-{(2-chlorophenyl3methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid, (E)-3-~2-n-butyl-1-{(2-chloro-6-fluorophenyl)-methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid, ~E)-3-[2-n-butyl-1 {(2-chlorophenyl)methyl}-lH-imidazo1-5-yl]-2-(3,4-dimethoxyphenyl)methyl-2-propenoic acid, ~ ~E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-(3,4-methylenedioxyphenyl)methyl-2-propenoic acid, (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazo1-5-yl]-2-(4-methoxyphenyl)methyl-2-propenoic acid, (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-4-chloro-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid, ~E)-3-[2-n-butyl-1 {~2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-(3,4-dihydroxyphenyl)methyl-2-propenoic acid, (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-(2-nitrophenyl)methyl-2-propenoic acid, (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-(4-N,N-dimethylaminophenyl)methyl-2-propenoic acid, and 2 ~ 3 1 (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-(4-aminophenyl)methyl-2-propenoic acid; or a pharmaceutically acceptable salt thereof.
The invention also relates to pharmaceutical compositions comprising a pharmaceutical carrier and an effective amount of a compound of the following Formula (IA):

2 ~ N ~ ~R5 (IA) in which:
Rl is phenyl, biphenyl, naphthyl, or adamantylmethyl, which are unsubstituted or substituted by one to three substituents selected from Cl, Br, F, I, 20 Cl-C4alkyl, nitro, C02R7, tetrazol-5-yl, Cl-C4alkoxy, hydroxy, SCl-C4alkyl, S02NHR7, NHS02R , S03H, ' 02Cl C4alkyl, or CnF2n+l, wherein n is 1-3;
s C2 ClOalkYl~ C3-ClOalkenyl, 25 C3-ClOalkynyl, C3 6cycloalkyl, or (CH2)0 8phenyl unsubstituted or substituted by one to three substituents selected from Cl-C$alXyl, nitro, Cl, Br, F, I, hydroxy, Cl-C4alkoxy, or N~ R ;
X is a single bond, S, or 0;
R3 is hydrogen, Cl, Br, F, I, CH0, hydroxymethyl, ' N02~ or CnF2n+l, wherein n is 1-3;
R4 and R5 are independently hydrog~n, Cl-C6alkyl, phenyl-Y-, naphthyl-Y-, or biphenyl-Y-, wherein the aryl groups are unæubstituted or substituted by one to three substituents selected from Cl, Br, F, I, Cl-C4alkoxy, y xy, C02R , CN, N02, tetrazol-5-yl, S03H CF

2~8~

1 CoNR7R7, S02NHR7, Cl-C4alkyl, or NR7R7, or by methylenedioxy, phenoxy or phenyl, except that R4 and R5 are not both selected from hydrogen;
Y is a single bond, O, S, or Cl-C6alkyl which is S straight or branched or optionally substituted by phenyl or benzyl, wherein each of the aryl groups is unsubstituted or substituted by halo, NO2, CF3, Cl C4a y 1 4 CN, or CO2R ;
R6 is -Z-COOR8 or -Z-CoNR7R7;
Z is a single bond, vinyl, -CH2 O-CH2-, methylene optionally substituted by Cl-C4alkyl, one or two benzyl groups, thienylmethyl, or furylmethyl, or -C(O)NHCHR9-, wherein R9 is H, Cl-C4alkyl, phenyl, benzyl, thienyl-methyl, or furylmethyl;
each R7 independently is hydrogen, Cl-C4alkyl, or (CH2~mphenyl, wherein m is 0-4; and R8 is hydrogen, Cl-C6alkyl, or 2-di(Cl-C4al~yl)-amino-2-oxoethyl; or R5 and R6 are both hydrogen, R4 is -Z-COOR8 and 20 z is other than a single bond; or a pharmaceutically acceptable salt thereof.
Also included in the present invention are methods for antagonizing angiotensin II receptors which comprises administering to a subject in need thereof an 25 effective amount of a compound of Formula (IA). Methods of producing antihypertensive activity and methods of - treating congestive heart failure, glaucoma, and renal ailure by administering these compounds are also included in this invention.
The compounds of this invention and of the pharma-ceutical compositions and methods of this invention are prepared by procedures described herein and illustrated by the examples. Reagents, protecting groups and functionality on the imidazole and other fragments of the 35 molecule must be consiste~t with the proposed chemical transformations. Steps in the synthesis must be 8 ~
_9_ l compatible with the functional groups and the protecting groups on the imidazole and other parts of the molecule.
The starting materials, 2-R2X-imidazole, are known to the art (J. Orq. Chem. 45:4038, 1980) or are synthesized by known procedures. For example, imidazole is converted to 2-n-butylimidazole by reacting imidazole with triethylorthoformate and p-toluenesulfonic acid to give l-diethoxyorthoamide imidazole and then treating with n-butyl lithium to give the 2-lithium derivative of the 10 orthoamide and alkylating with n-butyl iodide in a suitable solvent, such as tetrahydrofuran (THF).
The following procedure is useful fox the preparation of compounds of Formula (I) and (IA) particularly where Rl is 2-chlorophenyl, R2 is 15 n-bu~yl, R3 is hydrogen, chloro, or CF3, R4 is hydrogen, R5 is as described in Formula (I~ or (IA), R6 is COOR8 and R8 is hydrogen, methyl, or ethyl.
The l-RlCH2-group is incorporated onto the 2-R2X-imidazole by known procedures, for example, by 20 reaction with an Rl-CH2 halide, mesylate or acetate, such as 2-chlorobenzyl bromide, in a suitable solvent, such as dimethylformamide (DMF), in the presence of a suitable acid acceptor, such as sodium alkylate, potassium or sodium carbonate, or a metal hydride, preferably sodium 25 hydride at a reaction temperature of 25OC to 100C, preferably 50C. The resulting l-RlCH2-2-R2 imidazole is hydroxyme~hylated in the 5-position, for example, by react-ing with formaldehyde in the presence of sodium acetate in acetic acid to provide the l-RlCH2-2-R~X-5-hydroxymethyl-imidazole intermediates.
Alternatively, the l-RlCH2-~-R2-5-hydroxy-methylimidazole intermediates are prepared by reacting an imido ether, R2-C(=NH~-O-alkyl, such as valeramidine methyl ether, with dihydroxyacetone in liquid ammonia under pres-sure to give 2-R2-5-hydroxymethylimidazole. This intermediate is reacted with acetic anhydride to give l-acetyl-20 ~

1 5-acetoxymethyl-2-R2-imidazole. The diacetate intermediate is ~-alkylated, for example, using 2-chlorobenzyl triflate and the resulting l-RlCH2-2-R2-5-acetoxymethylimidazole is treated with aqueous base, such as 10% sodium hydroxide solution, to give the 1-RlCH2-2-R2-5-hydroxymethylimidazole intermediate.
Alternatively, the 2-RlS-imidazole compounds are prepared by the following procedure. Benzylamines, substituted by one to three s~sti~uents selected from 10 halo, Cl 4alkyl, Cl_4alkoxy, CN, NO2~ CF3, CO2Cl_6alkyl, SCl_4alkyl, or SO2C1 4alkyl, are alkylated with a Cl 6alkyl chloroace~ate, for example methyl chloroacetate, in the presence of a base, such as triethylamine, in a suitable solvent, such as dimethylformamide. The resulting 15 alkylaminoalkyl ester compounds are N-formulated with formic acid in the presence of a suitable solvent, such as xylenes, followed by C-formulation of the carbon alpha to both the amino and the ester groups. Reaction of this intermediate with acidic thiocyanate, preferably potassium 20 thiocyante, in an inert organic solvent, such as Cl 4alkyl alcohol produces 1-RCH2-2-mercapto-5-alkanoate ester imidazole compounds. The free thio group of the ester imidazole is reacted with a halo-R10 compound, wherein R10 is C2 1Oalkyl, C3 1Oalkenyl, C3-ClOalkynyl, ~5 C3-C6cycloalkyl or an optionally subs~ituted (CH2)0 8Ph, preferably propyl bromide, in the presence of a suitable base, such as sodium carbonate, in an appropriate solvent, such as ethyl acetate. The ester is reduced to the hydroxymethylimidazole intermediate by reduction with a suitable reagent, preferably diisobutyl aluminum hydride, in an appropriate solvent, such as tetrahydrofuran, at a temperature of -78C to 25C, preferably at less than --10 C .
The hydroxymethyl group of the hereinbefore 3~ prepared intermediate is oxidized to an aldehyde by treatment with a suitahle reagent, such as anhydrous ~0~8~

1 chromic acid-silica gel in tetrahydrofuran or, pre~erably, with activated lnanganese dioxide, in a suitable solvent such as benzene, or toluene, or preferably methylene chloride, at a temperature of 25C to 140C, preferably at 25C. The l-RlCH2-2-R2X-imidazol-S-carboxaldehydes are reacted with an appropriate phosphonate, such as those listed in Table I. The phosphonates are prepared, for example, from trialkyl phosphonoacetates by alkylation with an appropriate halide, mesylate or acetate in the 10 presence of a suitable base, such as sodium hydride, in a suitable solvent, preferably glyme at a reaction temperature of 25C to 110C, preferably at 55C, ~o provide, for example, the phosphonates listed in Table I.
The reaction of the imidazol-5-carboxaldehydes with the 15 phosphonates is performed in the presence of a suitable base, such as a metal alkoxide, lithium hydride or, preferably, sodium hydride, in a suitable solvent, such as ethanol, methanol, ether, dioxane, tetrahydrofuran or, preferably glyme, at a reaction temperature of 10C to 20 50C, preferably, at 25C, to provide a variable mixture - of trans and cis, e.g., (E) and (Z), l-RlCH2-2-R2X-5-CH=C(R )(COO-al~yl)-imidazoles. These isomers are readily separated by chromatography over silica gel in suitable solvent systems, preferably hexane in ethyl acetate 2~ mixtures. The esters are hydrolyzed to the acids, l-RlCH2-2-R2X-5-CH=C(R5)COOH-imidazoles, using a base, such as potassium hydroxide, lithium hydroxide or sodium hydroxide, in a suitable solvent system, such as, for example, aqueous alcohols or diglyme. The trans and cis structures of the acids are readily determined by NMR by the NOE protocol, as well as by the biological activities since, generally, the trans (E) isomeric acids are the more potent isomers.
Alternatively, the l-RlCH2-2-R2X-imidazol-5-carboxaldehydes are-prep~red by the fo-llowing procedure.
Starting 2-R2X-imidazol-s-carboxaldehydes are reacted , ' 2 ~ 3 1 with an N-alkylating protecting reagent, such as chloromethyl pivalate (POM-Cl), in the presence of a base, such as potassium carbonate, in a suitable solvent, such as dimethylformamide, at a temperature of 20C to 50C, preferably at 25C, to give N-alkylation (e.g., POM-derivation) on the least hindered nitrogen atom of the imidazole nucleus. The l-RlCH2-group is incorporated onto the imidazole by N-alkylation of the above prepared aldehyde with a halomethylbenzene compounds, such as 10 methyl 4-bromomethyl-3-chlorobenzoate, at a temperature of 80C to 125C, preferably at 100C. The protecting group on the 3-nitrogen of the imidazole ring is removed by base hydrolysis, for example using a biphasic mixture of ethyl acetate and aqueous sodium carbonate, to give 15 l-RlCH2-2-R2X-imidazole-5-carboxaldehyde compounds.
The Fcrmula (I) compounds can be prepared from these 5-carboxaldehyde compounds. by the methods described above.
Compounds of Formulas (I3 and (IA), wherein R6 is COOR8, Rl, R2, R3, R4 and R5 are as described in Formula (I) or (IA)., and R8 is H, methyl or ethyl, are also prepared by the following procedure.
The 2-R2X-imidazole starting materials are reacted with trimethylsilylethoxymethyl (SEM) chloride to give l-(trimethylsilyl)ethoxymethyl-2-R2X-imidazole. The reaction is carried out, for example, in the presen~e of sodium hydride in a solvent such as dimethylformamide.
The 5-tributyltin derivatives are prepared by lithiation with, for example, butyllithium in a suitable solvent, preferably diethyl ether, followed by treatment of the lithio imidazole derivative with a tributyltin halide, preferably tri-N-butyltin chloride, at -10C to 35C, preferably at 25C. The l-SEM-2-R2X-5-tributyltin-~ imidazole is coupled with an a,~-unsaturated acid ester having a leaving group on the B-position, such as a halide or trifluoromethanesu~fonyloxy group, ~or example, BrCR4=C(R5)(COOalkyl), in the presence of a pho~phine 2'~ 18'~3 1 ligand, such as bis(diphenylphosphino)propane, or triphenylphosphine and a palladium (II) compound, or preferably tetrakis(triphenylphosphine)palladium(0), and with or without a base, such as tributylamine, at a temperature of 50C to 150C, preferably at 120C. Both the (E) and (Z) olefinic isomers are prepared by this procedure, and the isomeric esters are readily separated by chromatography over silica gel. The l-SEM group from the (E) and (Z) isomers is hydrolyzed with acid, for 10 example, aqueous hydrochloric, in a suitable alcoholic solvent, such as methanol or ethanol, and the l-unsubs~ituted imidazole derivatives are converted to the l-t-butoxycarbonyl (t-BOC) imidazoles with di-t-butyl dicarbonate (Hoppe-Seyler's Z. Physiol. Chem., (1976), 15 357, 1651). The t-BOC esters are alkylated and hydrolyzed with, for example, 2-chlorobenzyl-O-triflate in the presence of a suitable base; preferably diisopropylethyl-amine, in ~ suitable solvent, preferably methylene chloride, to afford the l-~(2-chlorophenyl)methyl]-20 imidazole derivatives (esters). The (E) and (Z) isomersof the esters are hydrolyzed to the (E~ and ~Z) acids by the method described above.
Compounds of Formula (I) are also prepared by the following procedure. The l-RlCH2-2-R2X-imidazol-5-carboxaldehydes, prepared as described above, are reacted with a substituted half-ester, half-acid derivativ~ of a malonate, such as ethyl 2-carboxy-3-phenylpropionate, in the presence of a base, such as piperidine, in a suitable solven-t, such as toluene, at a temperature of 80C to 110C, preferably at 110C. The resulting l-RlCH2-2-R2X-5-CH=C(R5)COOalkyl)imidazoles are hydrolyzed to the corresponding Formula (I) acid compounds by alkaline hydrolysis as described above.
Compounds of Formulas (I) and (IA) in which is 2-chlorophenyl, R2 is n-butyl, R3 is H, Cl, or CF3, R4 is methyl, R5 is as described- i~ Formula (I~ or (IA), 2~:~8~

1 R6 is COOR8 and other parameters are as described above are prepared as follows. The l-RlCH2-2-R2X-imidazol-5-carboxaldeh~des, prepared as described above, are converted to the corresponding alcohols with an organometallic derivative or Grignard reagent, preferably methyl lithium, in a suitable solvent, such as tetrahydrofuran. The alcohol is oxidized, for example, using manganese dioxide to give the ketone. The olefinic esters are prepared from the ketone by reaction with 10 appropriate phosphonates to give the (E) and/or (Z) isomers which are readily separated. The acids are prepared from the esters by alkaline hydrolysis as described above.
Compounds of Formulas (I) and (IA) are also 15 prepared as follows. The l-Rl(CH2)-2-R2X-imidazol-5-carboxaldehydes are treated with the lithium derivative of a substituted ethyl or methyl ester. These lithio derivatives are prepared from the reaction of lithium diisopropylamide in a suitable solvent, pre~erably 20 tetrahydrofuran, with an acid ester, such as ROOC-CH2-Y-phenyl, to generate the ~-lithio derivatives at -78C
to -10C, preferably at -78C, which are then treated with the imidazolcarboxaldehyde. The intermediate B-hydroxy group of the imidazole ester is converted to a mesylate or an acetate and the mesylate, or preferably the acetate, is heated in a suitable solvent, such as toluene, with one to two equivalents of 1,8-diazobicyclo[5.4.0]undec-7-ene, at 50 to 110C, preferably at 80C, to af~ord ester compounds of Formula (I) or (IA) such as 3-(imidazol-5-yl)-2-benzyl-2-propenoic acid esters. The (E) isomer is the predominate olefinic isomer. The acids are prepared from the esters by the method described above.
Compounds of Formulas (I) and (IA) wherein is 2-chlorophenyl, R2 is n-butyl, R3 is H, Cl, CF3, or C~2OHi ~ is ~, ~5 is an-~ryl or a substituted aryl group as described in Formulas (I~ or (IA) and R6 ~ 2~118~

1 is COOH, may be prepared by heating l-Rl-2-R2X-imidazol-5-carboxaldehydes at 50C to 180C, preferably a~
140C, with an appropriate substituted aryl acetic acid and with acetic anhydride and potassium carbonate to provide unsaturated acids of Formulas (I) or (IA), such as 3-[2-n-butyl-1-(2-chlorophenyl)methyl-lH-imidazol-5-yl~-2-R5-2-propenoic acid. The trans olefinic acid is the principal product.
Compounds of Formulas (I) and (IA) in which R6 10 is Z-COOR8 where Z is an optionally substituted methylene group are prepared by reducing the trans or (E) isomers of 3-(imidazol-S-yl)-2-propenoic acid esters (prepared as described above) with an appropriate hydride reagent, preferably diisobutylaluminum hydride, in a 15 suitable solvent, such as tetrahydrofuran, to provide the unsaturated alcohol compounds (5-HOCH~CH=CH-imidazoles).
These compounds are reacted with ethyl chloroformate, for example, with a base, preferably triethylamine, in a suita~le solvent, such as tetrahydrofuran, to give 20 5-EtOOCOCH2CH=CH-imidazoles which are reacted with carbon monoxide in the presence of a phosphine ligand, preferably triphenylphosphine with palladium (II) acetate, in a suitable solvent, preferably tetrahydrofuran, at a temperature of 25C to 10QC, preferably at 40OC, to give 25 the 5-EtOOCCH2CH=CH-imidazoles. The corresponding acids are prepared from these ethyl esters by base hydrolysis as described above.
Compounds of Formulas (I) and ~IA) in which Z is -CH2COOR8 having additional substitution on the carbon 30 a to the carboxylate group are prepared by converting 5-EtOOCH2CH=CH-imidazoles to the lithium derivative of the ester with a lithium dialkylamide, preferably lithium diisopropylamide, and then treating with an alkylating agent, such as methyl halide, benzyl bromide, or hetero-35 cyclic methyl halide,it~ p~ovide the:mono-alkylated product compounds or the d al-kylated product compounds.

2 ~

1 The acid compounds are prepared from the esters by base hydrolysis.
Compounds of Formula (I) in which R6 is Z-COOR8 where Z is -CH2-0-CH2.- are prepared from the S above-prepared unsaturated alcohol compounds which had been obtained by the reduction of the Formula (I) propenoic acid esters. The alcohol is reacted with an appropriate hydride reagent, usch as sodium hydride, in a suitable solvent, such as glyme, followed by reaction with 10 an alkylating reagent, such as methyl bromoacetate to give the 5-MeOOCCH2 O-CH2CR5=CR4-imidazoles. The corresponding acids are prepared from these esters by base hydrolysis as described above.
Compounds of Formula (I) in which R6 is 15 Z-COOR8 where Z is -C(o)NHCHR9- are prepared from the Formula (I) propenoic acid compounds. These acids are reacted with an appropriateiy substituted amino acid, such as glycine methyl ester hydrochloride or phenylalanine methyl ester hydrochloride, in the presence of an 20 amide-forming reagent, such as N-hydroxysuccinimide and dicyclohexylcarbodiimide in the presence of a base, for example triethylamine, in a suitable solvent, such as tetrahydrofuran, a~ a temperature of 20C to 50C, preferably at 35C. The 5-C1 4alkylOOCCHR9NHC(O)-25 CH2CR5=CR4-imidazoles are converted to their corresponding acids by base hydrolysis as described above.
Compounds of Formula (I) in which the.Rl substituent is substituted by hydroxy are formed from Formula (I) compounds in which the Rl group is substituted by Cl-C4alkoxy using an ether-cleaving reagent, such as boron tribromide or hydrobromic acid.
Compounds of Formula (I~ in which the Rl substituent is substituted by carboxy are formed from Formula (I) compounds in which the Rl group is 3~ substituted by CQ2Cl-~421ky~.using basic hydrolysis, such as aqueous sodium o~pata~sium hydroxide in methanol 2 0 ~

l or ethanol, or using acidic hydrolysis, such as aqueous hydrochloric acid.
Compounds of Formula (I) in which the Rl substituent is substituted by a tetrazol-5-yl group are S prepared from the corresponding carboxy compounds. For example, the Formula (I) acid compounds are reacted with a halogenating agent, such as thionyl chloride in a suitable solvent, for example benzene, to give the corresponding acid halide compounds. The acid halides are then 10 converted to primary amide compounds in a reaction with concentrated ammonia. ~ubsequent dehydration of the amides with oxalyl chloride/dimethylformamide in acetonitrile/dimethylformamide yields the nitrile compounds, which are the immediate precursors to the 15 Formula (I) tetrazole compounds. Tetrazole formation is accomplished by reacting the nitriles with azide, preferably aluminum azide prepared in situ by the reaction of sodium azide with aluminum chloride, in a suitable solvent, for example tetrahydrofura~. The Formula (I) 20 compounds in which R6 is -Z-CO~H are prepared from these Formula (I) tetrazole ester compounds by base hydrolysis as described above.
Pharmaceutically acceptable acid addition salts of compounds of Formula (I) are formed with appropriate organic or inorganic acids by methods known in the art.
For example, the base is reacted with a suitable inorganic or organic acid in an aqueous miscible solvent such as ethanol with isolation of the salt by removing the solvent - or in an aqueous immiscible solvent wh~n the acid is soluble therein, ~uch as ethyl ether or chloroform, with the desired salt separating directly or isolated by removing the solvent. Representative examples of suitable acids are maleic, fumaric, benzoic, ascorbic, pamoic, succinic, bismethylenesalicy}ic, methanesulfonic, 35-- ethanedisulfonic~ aretic-, propionic, tartaric, salicylic, citric, gluconic, aspartic, stearic, palmitic, itaconic, .

2 ~ 3 1 glycolic, p-aminobenzoic, glutamic, benzenesulfonic, hydrochloric, hydrobromic, sulfuric, cyclohexylsulfamic, phosphoric and nitric acids.
Pharmaceutically acceptable base addition salts of compounds of Formula (I) in which R8 is H are prepared by known methods from organic and inorganic bases, including nontoxic alkali metal and alkaline earth bases, for example, calcium, lithium, sodium, and potassium hydroxide; ammonium hydroxide, and nontoxic 10 organic bases, such as triethylamine, butylamine, piperzine, and (trihydroxymethyl)methylamine.
Angiotensin II antagonist activity of the compounds of Formulas (I~ and (IA) is assessed by in vitro and in vivo methods. In vitro antagonist activity is 15 determined by the ability of the compounds to compete with 125I-angiotensin II for binding to vascular angiotensin II receptors and by their ability to antagonize the contractile response to angiotensin II in the isolated rabbit aorta. In vivo activity is evaluated by the ~ efficacy of the compounds to inhibit the pressor response to exogenous angiotensin II in conscious rats and to lower blood pressure in a rat model o~ renin dependen~
hypertension.

Bindinq The radioligand binding assay is a modification of a method previously described in detail (Gunther et al., Circ. Res. 47:278, 1980). A particular fraction from rat mesenteric arteries is incubated in Tris buffer with 80 pM of 125I-angiotensin II with or without angiotensin II antagonists for 1 hour at 25C. The incubation is terminated by rapid filtration and receptor bound l25I-angiotensin II trapped on the filter is quantitated with a gamma counter. The potency of angiotensin II antagonists 3~- is expressed as the IC50 whiich is the concentration of antagonist needed-to displace~ g~% of the total specifically 2 ~ ~ 8 l~

1 bound angiotensin II. Exemplary of the IC50 of compounds of the invention (E isomers) is about 2.6 to about 100 ~M.

; Aorta The ability of the compounds to antagonize angiotensin II induced vasoconstriction is examined in the rabbit aorta. Ring segments are cut from the rabbit thoracic aorta and suspended in organ baths containing 10 physiological salt solution. The ring segments are mounted over metal supports and attached to force displacement transducers which are connected to a recorder. Cumulative concentration response curves to angiotensin II are performed in the absence of antagonist 1~ or following a 30-minute incubation with antagonist.
Antagonist disassociation constants (K~) are cal~ulated by the dose ratio method using the mean effective concentrations. Exemplary of the KB of compounds of the invention (E isomers) is about 0.05 to about 25 ~M.

Inhibition of pressor resPonse to anqiotensin II in conscious rats Rats are prepared with indwelling femoral arterial and venous ca~heters and a stomach tube (Gellai 25 et al., Kidney Int. 15:419, 1979). Two to three days following surgery the rats are placed in a restrainer and blood pressure is continuously monitored from the arterial catheter with a pressure transducer and recorded on a polygraph. The change in mean arterial pressure in 3~ response ~o intravenous injections of 250 mg/kg angiotensin II is compared at various time points prior to and following the adminis~ration of the compounds intravenously or orally at doses of 3 to 300 mg/kg. The dose of compound needed to produce 50% inhibition of the ~5- contro-l response t~ angi~tensin II (IC50) is used to - estimate the poten~y o~ the ~ompounds. The I~50 f ~ V ~ 3 1 (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid is 1~ mg/kg i.v.

Antihypertensive activitY
The antihypertensive activity of the compounds is measured by their ability to reduce mean arterial pressure in conscious rats made renin-dependent hypertensive by ligation of the left renal artery (Cangiano et al., J.
Pharmacol. Exp. Ther. 208:310, 1979). Renal artery 10 ligated rats are prepared with indwelling catheters as described above. Seven to eight days following renal artery ligation, the time at which plasma renin levels are highest, the cGnscious rats are placed in restrainers and mean arterial pressure is continuously recorded prior to 15 and following the administration of the compounds intra-venously or orally. The dose of compound needed to reduce mean arterial pressure by 30 mm Hg (IC30) is used as an estimate of potency. The IC30 of (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-benzyl-2-20 propenoic acid is 10 mg/kg i.v.
The intraocular pressure lowering effectsemployed in this invention may be measured by the procedure described by Watkins, et al., J. Ocular Pharmacol., 1 (~):161-168 (1985).
The compounds of Formula (IA) are incorporated into convenient dosage forms, such as injectable preparations, or for orally active compounds, capsules or tablets. Solid or liquid pharmaceutical carriers are employed. Solid carriers include starch, lactose, calcium 3~ sulfate dihydrate, terra alba, sucrose, talc, gelatin, agar, pectin, acacia, magnesium stearate, and stearic acid. Liquid carriers include syrup, peanut oil, olive oil, saline, and water. Similarly, the carrier or diluent may inc~ude any prolonged release material, such as 3~ ycery~mo~ostearate or--~lycery~ distearatet alone or with a wax. The amount of solid carrier varies widely 2 ~

- l but, preferably, will be from about 25 mg to about 1 g per dosage unit. When a liquid carrier is used, the preparation will be in the form of a syrup, elixir, emulsion, soft gelatin capsule, sterile injectable liquid, such as an ampoule, or an aqueous or nonaqueous liquid suspension.
For topical ophthalmolgic administration, the pharmaceutical compositions adapted include solutions, suspensions, ointments, and solid inserts. Typical lO pharmaceutically acceptable carriers are, for example, water, mixtures of water and water-miscible solvents such as lower alkanols or vegetable oils, and water soluble ophthalmologically acceptable non-toxic polymers, for example, cellulose derivatives such as methyl cellulose.
15 The pharmaceutical preparation may also contain non-toxic auxiliary substances such as emulsifying, preserving, wetting, and bodying agents; as for example, polyethylene glycols; antibacterial components such as quarternary -ammonium compounds; buffering ingredients such as alkali 20 metal chloride; antioxidants such as sodium metabisulfite;
and other conventional ingredients such as sorbitan monolaurate.
Additionally, suitable ophthalmic vehicles can be used as carrier media for the present purpose including conventional phosphate buffer vehicle systems.
The pharmaceutical preparation may also be in the form o~ a solid insert. For example, one may use a solid water soluble polymer as the carrier for the medicament.
Solid water insoluble inser~s, such as those prepared from ethylene vinyl acetate copolymer, may also be utilized.
The pharmaceutical preparations are made following conventional techniques of a pharmaceutical chemist involving mixing, granulating, and compressing, when necessary, for tablet forms, or mixing, filling and 35 - diss~lving ~he ingredients, as appropriate, to give the desired oral, paEenteralr or,to~ical products.

2 ~ J~

.

1 Doses of the compounds of Formula (IA) in a pharmaceutical dosage unit as described above will be an efficacious, nontoxic quantity selected from the range of .01 - 200 mg/kg of active compound, preferably 1 - 100 S mg/kg. The selected dose is administered to a human patient in need of angiotensin II receptor antagonism from 1-6 times daily, orally, rectally, topically, by injec-tion, or continuously by infusion. Oral dosage units for human administration preferably contain from 10 to 500 mg 10 of active compound. Preferably, lower dosages are used for parenteral administration. Oral administration, at higher dosages, however, also can be used when safe and convenient for the patient. Topical formulations contain the active compound in an amount selected from 0.0001 to 1~ 0.1 (w/v%), preferably from 0.0001 to 0.01. As a topical dosage unit form, an amount of active compound frsm between 50 ng to 0.05 mg, preferably 50 ng to 5 ~g, is applied to the human eye.
The method of this invention of antagonizing 20 angiotensin II receptors in mammals, including humans, comprises administering to a subject in need of such antagonism an effective amount of a compound of Formula (IA). The method of this invention of producing anti-hypertensive activity and the methods of treating congestive heart failure, glaucoma, and renal failure comprise administering a compound or Formula (IA) to a subject in need of the indicated activity in an effective amount to produce said activity.
Contemplated equivalents of Formula (I) and (IA) compounds are compounds otherwise corresponding thereto wherein substituents have been added to any of the unsubstituted positions sf the Formula ~I) and (IA) compounds provided such compounds have the pharmaceutical utility of Formula (I) and ~IA) compounds.
~e ~ol--lowi~q examp~-~s i~lustrate preparation of compoun~s and pharmaceut~cal compositions of this c 2als~

1 invention. The examples are not intended to limit the scope of this invention as defined hereinabove and as claimed below.

Example l (E)-3-[2-n-Butyl-1-{(2-chlorophenyl)methyl~-lH-imidazol-5-Yl]-2-methyl-2-propenoic Acid (i) 2-n-butyl-1-(2-chlorophenyl)-methyl-lH-imidazole Imidazole was converted to the l-diethoxyortho-amide derivative by the method of Curtis and Brown, J.
Orq. Chem., (19~0), 45, 20. Imidazole (1~.8 g, 0.19 mol) 15 and 118.4 g (0.8 mol) of triethylorthoformate were reacted in the presence of 1 g of p-toluenesulfonic acid to give 20.6 (61~), bp 65-70C (0.1 mm) of l-diethoxyorthoamide imidazole. This product (24.0 g, 0.14 mol) was dissolved in dry tetrahydrofuran (250 mL), cooled to -40C and 20 n-butyl lithium (0.14 mol, 56.4 mL of 2.5 M in hexane) was added at -40C to -35C. After 15 minutes n-butyl iodide (31.1 g, 0.169 mol) was added at -40C, and the reaction was stirred overnight at ambient temperature. The reaction was partitioned between ether and 0.3 N
25 hydrochloric acid, and the organic layer was repeatedly ex~racted with dilute hydrochloric acid. The combined aqueous extracts were neutxalized with sodium bicarbonate solution, extracted with methylene chloride, dried over magnesium sulfate and concentrated. A flash distillation on a Kugelrohr apparatus provided 14.8 g (85%~ of 2-n-butylimidazole.
2-n-Butylimidazole (9.7 g, 0.078 mol) was dissolved in methanol (50 mL) and added dropwise to a solution o~ sodium methoxide (from sodium hydride (2.31 g, - 35 0.09343nD-l~-,i~ me~han~l ~250-mL~). After one hour the solution was evapora~ed to dryness,- and the sodium salt 84~

1 was taken up in dry dimethylformamide (150 mL) and 2-chlorobenzyl bromide (16.3 g, 0.079 mol) was added. The mixture was heated at 50C for 17 hours under argon, poured onto ice water and the product was extracted into ethyl acetate. The extract was washed, dried, and concentrated to give 18.5 g of crude product which was chromatographed over silica gel with 2:1 ethyl acetate/
hexane to provide 11.9 g (61~) of 2-n-butyl-1-(2-chloro-phenyl)methyl-lH-imidazole as an oil. Thin layer 10 chromatography on silica gel with 4:1 ethyl acetate/hexane gave an R~ value of 0.59.

(ii) 2 n-butyl-1-(2-chlorophenyl)methyl-5-hydroxymethyl-lH-imidazole 15 Method A
A mixture of 2-n-butyl-1-~2-chlorophenyl)methyl-lH-imidazole (95.5 g, 0.384 mol), 37% formaldehyde (500 mL), sodium acetate (80 g) and acetic acid (60 mL) was heated to reflux for 40 hours under argon. The reaction 20 was concentrated in vacuo, and the residue was stirred with 500 mL of 20% sodium hydroxide solution for 4 hours, diluted with water and extxacted with methylene chloride.
The extract was washed, dried, and concsntrated. The crude product (117 g) was flash chromatographed over 600 g of silica gel with a gradient of ethyl acetate to 10% of methanol in ethyl acetate to give 8.3 g of starting material, 24.5 g of a mixture of starting material and product, and 44 g (41%) of 2-n-butyl-1-(2-chlorophenyl)-methyl-5-hydroxymethyl-1H-imidazole; mp 86-88C (from ethyl acetate). Further elution provided the bis (4,5-hydroxymethyl) derivative; mp 138-140C (from ethyl acetate). - -Method B
~ mixture of v-aleramidine methyl ether -hydrochtoride~2s~ g,-~.6-6 mQl-~ and dihydroxyacetone (150 ~i 2~

g, O.û3 mol) dissolved in liquid ammsnia was allowed to stand overnight at room temperature in a pressure vessel, and then hea~ed at 65C for 4 hours at 375 psi. The ammonia was allowed to evaporate, and the residue was 5 dissolved in methanol (3 h). The resulting slurry was refluxed with added acetonitrile (1 L). The solution was decanted from the solid ammonium chloride while hot. This procedure was repeated, and the combined acetonitrile extracts were treated with charcoal, filtered hot and the 10 filtrate was concentrated in vacuum to give the dark oil, 2-n-butyl-5-hydroxymethylimidazole (253 g, 1.63 mol, 98%).
This crude alcohol (253 g) was treated with acetic anhydride ~400 mL) at -15C and then was allowed to warm to ambient temperature with stirring, and then 15 stirred an additional 19 hours. The acetic anhydride was evaporated at reduced pressure, the residue taken up in methylene chloride, and the organic phase was washed with 5% sodium bicarbonate solution and water. The extract was dried over sodium sulfate and concentrated to give 323 g 20 (83%) of 1-acetyl-4-acetoxyrnethyl-2-n-butylimidazole.
This diacetate was N-alkylated by the following procedure. To a solution of triflic anhydride (120 mL, 0.71 mol) in methylene chloride (200 mL) at -78C under argon was added a solution of diisopropyl ethylamine (128 25 mL, 0.73 mol) and 2-chlorobenzyl alcohol (104 g, 0.72 mol) in methylene chloride (350 mL) over a period ofj20 minutes. After being stirred an additional 20 minutes at -78C, this solution was then treated with l-acetyl-d~-acetoxymetnyl-2-n-butylimidazole (146 g, 0.61 mol) 30 dissolved in methylene chloride (300 mL) over a 20-minute interval. The mixture was then stirred at ambient temperature for 18 hours and the solvents were evaporated.
The residual 2-n-butyl-5-acetoxymethyl-1-~2-chlorophenyl)methyl lH-imidazole was used without 35 purification for the hydrolysis of the acetate group.

- 2 ~ 3 1 A solution of crude 2-n-butyl-5-acetoxymethyl-1-(2-chlorophenyl)methyl-lH-imidazole (250 g~ in methanol (200 mL) was treated with 10% sodium hydroxide solution ~700 mL) and the mixture was heated on a steam bath for 4 hours. After cooling, methylene chloride was added, the organic phase was separated, washed with water, dried and concentrated. The residue was dissolved in ether, cooled, and seeded to give the crude product. Recrystallization from ethyl acetate gave 176 g of 2-n-butyl-1-(2-chloro-10 phenyl)methyl-5-hydroxymethyl-lH-imidazole; mp 138-140C.
This material was identical in all respects to the product prepared by Method A.

(iii~ 2-n-butyl~ 2-chlorophenyl)methyl-lH-imidazol-5-carboxaldehyde A solution of 2-n-butyl-1-(2-chlorophenyl)methyl-5-hydroxymethyl-lH-imidazole (5.4 g, 0.0194 mol) in methylene chloride (25 mL) was added to a suspension of activated manganese dioxide (27 g) in methylene chloride 2~ (325 mL). The suspension was stirred at room temperature for 17 hours. The solids were filtered and the filtrate concentrated and flash chromatographed over silica gel with 6:4 hexane/ethyl acetatP to afford ~.16 g (78%~ of 2-n-butyl-1-(2-chlorophenyl)methyl-lH~imidazol-5-carboxaldehyde, as an oil. NMR and IR were consistent with the structure.

(iv) ethyl (E)-3-[2-n-butyl-1-{(2-chloro-phenyl)methyl}lH-imidazol-5-yl]-2-methyl-2-propenoate Ethanol (5 mL) was treated with sodium metal (0.101 g, 0.0044 g-a~om), then triethyl 2-phosphono-propionate (0.953 g, 0.004 mol) in ethanol (2 mL) was added. After 5 minutes a solution of ~-n-butyl-l-3S -(2-ch~orophenyl)methyl-lH-imidazol-s-carboxaldehyde (1.1 g, 0.004 mol) in ethanol (2 mL) was added to give an 1 initial exotherm. The reaction mixture was s~irred at ambient temperature under argon for 2 hours, concentrated in vacuo and the residue partitioned between water and ethyl acetate. The extract was washed, dried, and concentrated. The crude product was flash chromatographed over silica gel with an ethyl acetate/hexane gradient to provide ethyl (E)-3-~2-n-butyl-1-{(2-chlorophenyl)-methyl}-lH-imidazol-5-yl]-2-methyl-2-propenoate (0.85 g, 59%) as an oil; NMR (NOE) was consistent with the 10 strUcture .

(v) (E)-3-~2-n-butyl-1-{(2-chloro-phenyl)methyl}-lH-imidazol-5-yl]-2-methyl-2-propenoic acid A solution of the ethyl ester (Example 1 (iv)) (850 mg, 2.36 mmol) in ethanol (10 mL) was treated with a solution of sodium hydroxide (283 mg of sodium hydroxide pellets in 2 mL of water) at room temperature for 2 hours. The reaction was acidified in the cold to pH 3.~
20 with dilute hydrochloric acid solution to deposit a white precipitate. The product was filtered, washed with water and dried at 40C for 18 hours to give (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-methyl-2-propenoic acid; 539 mg, mp 2~8-229C. The NMR ~NOE) supports the trans stereochemistry of the carboxylic acid and imidazole groups.

~xamples 2-10 In Table I are listed other examples of alkenoic acids prepared from 2-n-butyl-1-(2-chlorophenyl)methyl-lH-imidazole-5-carboxaldehyde by the m~thods described in Example 1 (iv-v). The reagents and products are shown in Table I.
3~

; 2 ~ 3 2 0 ~ ~ X ~ = :e = ~ = I =

2~)~ 8~3 ~: o ~ o ~ o a o E O a ~, ., L ~ ~

~ ,~ a ~ a~ ~ ~t.t~
2 0 ccl x ~: ; 2 X :~: :!: 3: a. e - 1 Example 11 (E and z?-3-t2-n-But~lc~ sL~e~yl-methyl~-lH-imidazol-5-yl]-2-propenoic Acid Method A
The modification of the procedure of Example 1 (iv-v) was used. To a suspension of sodium hydride (0.492 g, O.0205 mol~ in glyme (30 mL) was added dropwise under 10 argon trimethyl phosphonoacetate (3.73 g, 0.0205 mol).
After one hour at ambient temperature, 2-n-butyl-1-(2-chlorophenyl)me~hyl-lH-imidazol-5-carboxaldehyde (~.78 g, - -0.0137 mol~ was added, and the mixture was stirred at 40OC
for one hour. The reaction was quenched with ice water, lS the product extracted into ether and the washed, dried concentrated product slowly crystallized to the low melting solid (3.39 g, 83%) methyl (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-pro-penoate. None of the æ isomer was detected by TLC or NMR
in the purified product. The (E) ester (132 mg) was dissolved in ethanol (4 mL) and 10% sodium hydroxide solution (O.5 mL) was added. The solution was stirred at 25C under argon for 17 hours, 10% hydrochloric acid solution was added to pH 3.5 and the white solid was filtered, washed with water, and dried at 40C in vacuum to give 71 mg (59%) of E-3-[2-n-butyl-1-{(2-chloro phenyl)methyl}-lH-imidazo1-5~yl]-2-propenoic acid;
mp 178-179C.

Method B
(i) 2-n-butyl-1-(trimethylsilyl)-ethoxymethylimidazole Hexane-washed 80% sodium hydride (1.45 g, 0.0483 mol) in dimethylformamide (80 mL) under argon was treated with a solution of 2-n-butylimidazole (5.45 g, 0.0439 mol) in dimethylformamide (14 mL) dropwise at 25C and the reac-f' ~

- 1 tion was stirred an additional hour. Then 2-(trimethyl-silyl)ethoxymethyl chloride (SEM-Cl) (7.68 g, 0.0461 mol) was added, the mixture was stirred for 18 hours at ambient temperature ~nd then partitioned between ice water and ethyl acetate. The washed, dried, concentrated organic solution was chromatographed over silica gel with 1:1 hexane in ethyl acetate to yield 10.8 g (96%) of 2-n-butyl-l-(trimethylsilyl)ethoxymethylimidazole.

(ii) 2-n-butyl-5-tributyltin-1-(tri-methylsilyl)ethoxymethylimidazole A solution of 2-n-butyl-1-SEM imidazole (prepared above) (6.37 g, 0.025 mol) in ethyl ether (125 mL) was treated dropwise with n-butyl lithium (0.0255 mol, 10.2 mL
15 of 2.5 M in hexane) under argon at room temperature.
After being stirred for an additional 45 minutes, tributyl-tin chloride (~.83 g, 7.4 mL, 0.026 mol) was added dropwise. The suspension was stirred overnight, saturated ammonium chloride solu~ion was added and the ether layer 20 was separated, washed with brine, dried over sodium sulfate, concentrated and flash chromatographed over silica gel with 3:1 hexane/ethyl acetate to provide 11.3 g (83%) of 2-n-butyl-5-tributyltin-1-(trimethylsilyl)-ethoxymethylimidazole.
(iii) ethyl (E and Z)-3-[2-n-butyl-1-{(trimethylsilyl)ethoxymethyl}-lH-imidazol-5-yl]-2-propenoate To a solution of n-butyl-~-tributyltin-l-(tri-methylsilyl)ethoxymethylimidazole (11.3 g, 0.0208 mol) inm-xylene (150 mL) was added ethyl 3-bromopropenoate (4.17 g, 0.0233 mol), followed by ~etrakis(triphenylphosphine)-palladium(0) (0.48 g, 0.416 mmol). The reaction mixture was heated at 120C for 18 hours under argon. The cooled mixture was washed with water, 10% ammonium hydroxide solution and brine. The solution was treated with 20~ ~L~

1 charcoal and sodium sul~ate, filtered, concentrated and chromatographed over silica gel with 9:1 hexane in ethyl acetate to give 1.96 g (27%) of ethyl (Z)-3-[2-n-butyl-l-{(trimethylsilyl)ethoxymethyl}-lH-imidazol-5-yl]-2-propenoate as an oil. Further elution with 4:1 hexaneacetate afforded the ~-isomer (1.98 g, 27%) as an oil.

(iv) ethyl (E and Z~-3-~3-n-butyl-1-t-butoxy-carbonyl-lH-imidazol-5-yl]-2-propenoate A solution of ethyl-(Z)-3-[2-n-butyl-1-{(trimethylsilyl)ethoxymethyl}-lH-imidazol-5-yl]-2-propenoate (1.24 g, 3.52 mmol) in ethanol (10 mL) was heated at 60C for 3.5 hours with 5N hydrochloric acid solution (20 mL). The cooled reaction was ~asified with 15 10% sodium hydroxide solution, extracted with ethyl acetate, washed with water, dried and concentrated to 0.644 g (82%) of an oil. This was dissolved in methanol (15 mL), triethylamine (1.5 mh, 10.6 mmol), and di-tert-butyldicarbonate (2.3 g, 10.s mmol) were added and 20 the mixture was stirred for 18 hours at ambient temperature. The mixture was concentrated in vacuo and chromatographed over silica gel with 4:1 hexane/ethyl acetate to give 0.402 g (36%) of ethyl (Z)-3-~2-n-butyl-l-t-butoxycarbonyl-lH-imidazol-4-yl]-2-propenoate as an oil. The (E)-isomer was prepared by the same procedure described for the (Z)-isomer. From 1.02 g (2.9 mmol) of ethyl (E)-3-~2-n-butyl-1-{(trimethylsilyl)ethoxy-methyl}-lH-imidazol-5-yl]-2-propenoate was obtained 334 mg (36%) ethyl (E)-3-~2-n-butyl-1-t-butoxycarbonyl-lH-imidazol-5-yl]-2-propenoate as an oil.

(v) e~hyl (E and Z)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-propenoate To a stirred solutian of trifluoromethanesulfonic anhydride (387 mg, 1.37 mmol~ in methylene chloride ~ 2 ~

1 (1 mL) held at -75C under argon was added a solution of 2-chlorobenzyl alcohol (196 mg, 1.37 mmol) and diisopropyl-ethylamine (177 mg, 1.37 mmol) in methylene chloride (4 mL). After being stirred for 20 minutes at -75C, a S solution of ethyl (Z)-3-~2-n-butyl-1-t-butoxycarbonyl-lH-imidazol-5-yl]-2-propenoate in methylene chloride (2 mL) was added dropwise over 10 minutes and the mixture was stirred overnight at 25C. A solution of 5% sodium bicarbonate solution was added with stirring and the 10 layers were separated, washed and dried. The reaction mixture was evaporated to dryness, the residue triturated with 1:1 hexane/ethyl acetate, the solid filtered off and the filtrate was concentrated and chromatographed over silica gel with 7:3 hexane/ethyl acetate to provide the lS title (Z)-isomer (184 mg, 43~) as an oil. The title (E)-isomer was prepared by the same procedure described for the (Z)-isomer. From 334 mg (1.04 mmol) of ethyl (E)-[2-n-butyl-1-t-butoxycarbonyl-lH-imidazol-5-yl]-2-propenoate was obtained 132 mg (37%) of ethyl(E)-3-[2~
20 n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-propenoate which was identical in all respects to the product obtained by Method A.

(vi) (Z)-3-[2-n-butyl-1-{(2-chlorophenyl) methyl}-lH-imidazol-5-yl]-2-propenoic acid The title compound was prepared according to the procedure described in Example 11 Method A by using ethyl (Z)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-propenoate in place of methyl (E)-3-[~-n-butyl-3~ 1-{(2-chlorophenyl)methyl}-lH-imidazol-S-yl]-2-propenoate. The title compound had a mp 183-184C. The NMR was consistent with a cis or (Z) relationship of the imidazole and carboxyl groups.

~ 2~18~3 1 ExamPle 12 (E)-3-[2-n-Butyl-l-t(2-chlorophenyl)methyl~-lH-imidazol-5-Yl]-3-methYl-2-propenoic Acid (i) 2-n-butyl-1-(2-chlorophenyl)methyl-5-(a-hydroxy)ethyl-lH-imidazole A solution of 2-n-butyl-1-(2-chlorophenyl)methyl-lH-imidazole-5-carboxaldehyde (Example l(ii)) (1.1 g, 3.97 10 mmol) was dissolved in dry tetrahydrofuran (15 mL), cooled to -78C under argon and a solution of methyl lithium (3.64 ml of 1.-2 M in diethyl ether, 4.57 mmol) was added dropwise. The mixture was stirred for 1.5 hours, quenched with ammonium chloride solution, warmed to ambient tempera-15 ture and extracted with ethyl acetate. The washed, dried,concentra~ed product was flash chromatographed over silica gel with ethyl acetate to provide 1.07 g (92%) of 2-n-butyl-1-(2-chlorophenyl)methyl-5-(a-hydroxy)ethyl-lH-imidazole.
2~
(ii) t2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]methyl ketone A mixture of 2-n-butyl-1-(2-chlorophenyl)methyl-5-(a-hydrox~v)ethyl-lH imidazole (1.07 g, 3.65 mmol), activated manganese dioxide (6 g) and toluene (7S mL) was heated at 90 to 100C under a slight vacuum with a Dean Stark water separator for 17 hours. The inorganics were filtered, the concentrated ~iltrate was applied to a flash silica gel column and the product was eluted with 3:7 hexane/ethyl acetate to give 0.628 g (59%) of [2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]methyl ketone.

'~318~3 1(iii) ethyl (E~-3-[2-n-butyl-1-{(2-chloro-phenyl)methyl}-lH-imidazol-5-yl]-3-methyl-2-propenoate To absolute ethanol (3 mL) was added freshly cut sodium (55 mg). Then triethyl phosphonoacetate (0.504 g, 2.16 mmol) and [2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazole-5-yl]methyl ketone (0.628 g, 2.16 mmol) were added and the mixture was stirred at 70~ for 17 hours, The reaction was concentrated, partitioned between ethyl 10 acetate and water, and the organic layer was washed with water, dried, concentrated and chromatographed to afford 214 mg (27%) of the title compound. The NMR was consistent with a trans relationship of ~midazole to the carboxylate group.
1~
(iv) (E)-3-[2-n-butyl-1-{(2-chloro-phenyl)methyl}-lH-imidazol-5-yl]-3-methyl-2-propenoic acid The title compound was prepared according to 20 Example l(v) by using ethyl (E)-3-~2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazo1-5-yl]-3-methyl-2-propenoate in place of ethyl-(E)-3-~2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-methyl-2-propenoate. The title compound was a white solid, and was converted to the hydrochloride salt to give 82 mg (41%~;
mp 198-199.5C (from ethyl acetate/methanol).

Example 13 ~E) 3-~2-n-ButYl-1-~(2-chloro-6--fluorophenyl)-methyl~-lH-imidaæol-s-yl]-2-benzyl-2-propenoic Acid (i) 2-n-butyl-1-(2-chloro-6-fluoro-phenyl)methyl-lH-imidazole 35A solution of 2 n butylimidazole (3.75 g, 0.03 mol) in dry dimethyiformamide (4 mL) was added to sodium ~: 2vi~,3 1 hydride (0,95 g~ in dime~hylformamide (18 mL). After the gas evolu~ion subsided, the mixture was stirred one hour under argon and 2-chloro-6-fluorobenzylchloride (5.5. g, 0.031 mol) in dimethylformamide (7 mL) was added to produce an exotherm. The mixture was stirred for 17 hours at ambient temperature, diluted with ice water and extracted with ethyl acetate. The washed, dried, concentrated organic layer provided 7.63 (94~) of the title compound whose NMR was consistent with the 10 structure. This material was used without further purification.

(ii) 2-n-butyl-1-(2-chloro-6-fluorophenyl)-methyl-lH-imidazol-5-carboxaldehyde lS The procedures of Example l(ii-iii) were used.
From 7.63 g of crude 2-n-butyl-1-(2-chloro-6-fluorophenyl)-methyl-lH-imidazole and p~oportional amounts of other reagents was obtained 2.8 g of 2-n-butyl-1-(2-chloro-6-fluorophenyl)methyl-5-hydroxymethyl-1H-imidazole after chromatography over silica gel with 3% of methanol in methylene chloride; mp 106-108C (from ethyl acetate).
This material was oxidized with manganese dioxide and worked up as described above to give 0.88 g (63%) of 2-n-butyl-2-(2-chloro-6-fluorophenyl)methyl-lH-imidazol-5-carboxaldehyde; mp 8~-90C (from ethyl acetate).

(iii) (~)-3-~2-n-butyl-1-{~2-chloro-6-fluorophenyl)methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid The procedure of Example l(iv-v) was used. From 0.9 g (3.05 mmol) of ~-n-butyl-1-(2-chloro-6-fluorophenyl)-methyl-lH-imidazol-5-carboxaldehyde, 3 g (11 mol) of trimethyl benzylphosphonoacetate, 0.28 g of sodium hydride and glyme (12 mL) held at 60C for 1 hour was obtained, aft~r ~hroma~ography over silica gel with 50% of hexane in ethyl acetate, 0.44 g (33~) of the trans isomer methyl ~;` 20~g~

1 (E~-t2-n-butyl-1-{(2-chloro-6-fluorophenyl)methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoate and 0.01 g (8%) of the corresponding cis or (Z)-isomer. The (E)-isomer (O.43 g, 0.98 mmol) was hydrolyzed to the acid and the .
produc~ was crystallized from methanol to afford 0.38 g (91%) of (E)-3-[2-n-butyl-1-{(2-chloro-6-fluorophenyl)-methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid; mp 204-206C.
10 ~xample 14 (E)-3-[2-n-Butyl-1-{(2 chlorophenyl3methYl~-lH-imidazol-5-yl]-2-phenyl-2-Propenoic Acid 15A mixture of 2-n-butyl-1-(2-chlorophenyl)methyl-lH-imidazol-5-carboxaldehyde (554 mg, 2 mmol), phenyl-acetic acid (310 mg, 2.3 mmol), potassium carbonate (126 mg, 0.91 mmol), and acetic anhydride (1 mL) was heated gradually to 140C-and held at this temperature for 6 20 hours. The cooled reaction was diluted with water and the oily solid was separated, triturated several times with ether, and the solid was crystallized several times from methanol/ethyl acetate to give 143 mg (18%) of the title compound; mp 210-212C. The NMR was consistent with the trans olefinic product.

Example 15 (E)-3-[2-n-Butyl-1-{(2-chlorophenYl)methyl~-lH-30imidazo1-5-Yl]-2-(2-naPhthyl)-2-ProPenoic Acid The compound was prepared according to Example 14 using 2-naphthylacetic acid in place of phenylacetic acid. The title compound was a solid; mp 271-273C (d).

'; 20~8 1 Example 16 (E)-3-[2-n-Butyl-1-{(2-chlorophenyl)methyl~-lH-imidazol-5-yl]-2-heptenoic Acid (i) Ethyl 3-trifluoromethane-sulfonyloxy-2-heptenoate Ethyl 3-ketoheptanoa~e (2.07 g, 12 mmol) was dissolved in dimethylformamide (60 mL) under argon and 10 sodium hydride (3~7 mg, 14.4 mmol) was added. After 30 minutes at room temperature the solid N-phenyltrifluoro-methanesulfonimide (Tetra. Letters, (1983), 24, 979) (4.97 g, 13.8 mmol) was added. The reaction was stirred for 2 hours, diluted with ether/water and the usual workup gave 15 after chromatography with 5:95 ether/hexane 3.45 g (94%) of ethyl 3-trifluoromethanesulfonyloxy-2-heptenoate.

(ii) ethyl ~E)-3-~2-n-butyl-1-{ttri-methylsilyl3Pthoxymethyl} lH-imidazol-5-yl~-2-heptenoate A solution of 2-n-butyl-5-tributyltin-1-(tri-methlysilyl)ethoxymethyl imidazole (Example 11, Method B(ii)) (1.973 g, 3.63 mmol) and ethyl 3-trifluoromethane-sulfonyloxy-2-hep~enoate t1.1 g, 3.62 mmol~ in tetrahydro-uran (5 mL) was added to a mixture of lithium chloride(4.70 mg, 11.1 mmol) and tetrakis(triphenylphosphine)-palladium(o) (88 mg, 0.076 mmol) in tetrahydrofuran (10 ~L). The reaction was heated to reflux under argon for 5 hours, cooled, diluted with ether and the ether layer was washed with water, 10% ammonium hydroxide solution and brine. The extract was dried with sodium sulfate and concentrated. The crude product (2.58 g~ was chromatographed over silica gel with a gradient of hexane in ethyl acetate to give 1.09 g (74%) of the title compound.

2~18~

1(iii) ethyl (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-heptenoate The procedure of Example 11, Method B(iv, v) was followed using ethyl (E)-3-[2-n-butyl-1-{~trimethyl-silyl)ethoxymethyl}-lH-imidazol-5-yl]-2-heptenoate in place of ethyl (E)-3-~2-n-butyl-1-{(trimethylsilyl)-ethoxymethyl}-lH-imidazol-5-yl]-2-propenoate. The title compound was isolated as an oil after this three step 10 reaction seguence in a yield of 40% af~er chromatography.

(iv) (E)-3-[2-n-butyl-1-{(2-chlorophenyl)-methyl}-lH-imidazol-5-yl]-2-heptenoic acid The ethyl ester (149 mg) was dissolved in ethanol 15 (2 mL) and 10% sodium hydroxide solution (0.5 mL) was added. An additional 1 ml of base was added incrementally over several hours and the mixture was stirred overnight at room temperature. The cooled reaction was acidified to pH 5 with dilute hydrochloric acid solution, extracted ~ with methylene chloride and the resulting residue was triturated with ether/hexane to provide 56 mg of the title compound; mp 131-132C.

Example 17 (E?-3-[2-n-Butyl-1 1 2_chlorophenYl)-methyl~-lH-imidazol-s-yl]-4-phenyl-2-butenoic Acid (i) Ethyl 4-phenyl-3-trifluoro-30methanesulfonyloxy-2-butenoate This compound was prepared according to Example 16(i~ using ethyl 4-phenyl-3-ketobutanoate in place of ethyl 3-ketoheptanoate.

~5 2 ~

1 (ii) ethyl (E)-3-[2-n-butyl-1-{(tri-methylsilyl)ethoxymethyl}-lH-imidazol-5-yl]-4-phenyl-2-butenoate To a solution of 2-n-butyl-1-SEM-imidazole S (Example 11, ~ethod B(i)) (1.8 g, 5.32 mmol) in ethyl ether (16 mL) was added n-butyl lithium in hexane (6.5 mmol) at a slow ra~e. After an additional hour of stirring at 25C, a solution of zinc chloride in ether (6.5 mL of 1.0 M) was added followed by tetrahydrofuran 10 (15 mL). After an additional 75 minutes of stirring, the zinc chloride imidazole adduct solution was transferred under argon to a solution of ethyl 4-pnenyl-3-trifluoro-methanesulfonyloxybutenoate (1.63 g, 6.41 mmol) and tetrakis(triphenylphosphine)palladium(o) (317 mg) in 15 tetrahydrofuran (30 mL). The reaction mixture was stirred at 25C for 20 hours and worked up as in Example 16(ii) to provide 1.77 g (75~) of ethyl (E)-3-[2-n-butyl-1-{trimethylsilyl)ethoxymethyl}-lH-imidazol-5-yl]-4-phenyl-2-butenoate.
(iii) ethyl (E)-3-[2-n-butyl-1-{(2-chloro-phenyl)methyl}-lH-imidazol-5-yl]-4-phenyl-2-butenoate The compound was prepared according to the procedure of Example 11, Method B(iv, v) using ethyl (E)-3-~2-n-butyl-1-{(trimethylsilyl)ethoxymethyl}-lH-imidazol-5-yl]-4-phenyl-2-butenoate in place of e~hyl (E~ 3-[2-n-butyl-1-{(trimethylsilyl)ethoxymethyl}-lH-imidazol-5-ylJ-2-propenoate. The title ccmpound was an 30 oil.

(iv) (~)-3-[~-n-butyl-1-{(2-chloro-phenyl)methyl}-lH-imida~ol-5-yl]-4 phenyl-2-butenoic acid Th~ above ethyl ester (520 mg) was dissolved in ethanol (5 mL) and 5 N hydrochloric acid solution (40 mL), 2 0 .18 ~ L~ ~

.

1 and the solution was slowly heated at 100C with evaporation of the alcohol. Af~er being heated at 100C
for 6 hours, the react.ion was cooled and the white precipitate was collected, air-dried, and then triturated with ether/methanol to afford 345 mg (65%) of (E)-3-~2-n-butyl-l-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-4-phenyl-2-butenoic acid hydrochloride; mp 92-94C.

Example 18 (E~-4-[2-n-Butyl-1-{(2-chlorophen~l)methyl~-lH-imidazol-5-yl]-3-butenoic Acid (i) (E)-3-[2-n-butyl-1-{(2-chlorophenyl)-methyl}-lH-imidazol-5-yl]-2-propenol A solution of methyl (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-propenoate (Example 11, Method A) (0.5 g, I.5 mmol) in dry tetrahydrofuran (10 mL) held at -78C under argon was 20 treated dropwise with a solution of diisobutyl aluminum hydride in toluene (3.30 mmol, 2.2 mL of 1.5 M). The mixture was allowed to warm to ambient temperature and stirred an additional 17 hours. Excess reducing agent was quenched with methanol and water, dilu~e acetic acid and methylene chloride were added, and the organic layer was washed with sodium bicarbonate solution, dried and concentrated to 0.507 g of the title compound as an oil.

(ii) ethyl (E)-3-[2-n-butyl-1-{(2-chloro-phenyl)methyl}-lH-imidazol-5-yl]-2-propenyl carbonate To a solution of (E)-3-~2-n-butyl-1-{~2-chloro-phenyl)methyl}-lH-imidazol-s-yl]-2-propenol (2.09 g, 6.86 mmol) in methylene chloride (20 mL) and triethyl-amine (1.25 mL, 12.4 mmo~) cooled to 0C under argon wasadded dropwise ethyl chloroformate (1.34 g, 1.18 ml, 12 2 ~ 1 8 ~ L~ r3 1 mmol). The reaction was then stirred at ambient tempera-ture overnight. Ethyl acetate was added, the precipitate filtered and the concentrated filtrate was flash chromatographed over silica gel with 3:7 hexane/ethyl S acetate to provide 1.67 g (65~) yield of the title carbonate as an oil. The NM~ and IR of the product were consistent with the ~tructure.

(iii) ethyl (E)-4-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazole-5-yl] 3-butenoate A solution of ethyl (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-propenyl carbonate (1.42 g, 3.77 mmol) in tetrahydrofuran (12 mL) 15 under an atmosphere of carbon monoxide was treated with triphenylphosphine (49 mg, 0.188 mmol) and palladium diacetate and the mixture was heated at 40C for 2-1/2 hours. The concentrated reaction mixture was applied to a flash column of silica gel and eluted with 1:1 hexane/
ethyl acetate to afford 355 mg (26%) of the title compound as an oil.

(iv) (E)-4-~2-n-butyl-1-{(2-chloro-phenyl)methyl}-lH-imidazol-5-yl]}-3-butenoic acid The compound was prepared according to the procedure of Example l(v) using ethyl (E)-4-~2-n-butyl-1-~(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-3-butenoate in place of ethyl (E)-3-[2-n-butyl-1-{(2-chlorophenyl-methyl}-lH-imidazol-5-yl]-2-methyl-2-propenoate. The title compound is a white solid; mp 135-137C, hydro-chloride salt mp 176-178C.

- 2~1 g~4~

1 Example 19 ~E)-4-[2-n-Butyl-1-{(2 chlorophenYl)methYl~-lH-imidazol 5-yl]-2,2-bis(benzYl)-3-butenoic Acid (i) ethyl (E)-~-[2-n-butyl-1 {(2-chloro-phenyl)methyl}-lH-imidazol-5-yl]-2,2-bis(benzyl)-3-butenoate A ~olution of ethyl (E)-4-[2-n-butyl-1-{(2-10 chlorophenyl)methyl}-lH-imidazol-5-yl]-3-butenoate (256 mg, 0.709 mmol) in tetrahydrofuran (5 mL) was cooled to -78C under argon, and lithium diisopropylamide (0.85 mmol, 1 M in tetrahydrofuran) was added. After lo minutes benzyl bromide (243 mg, 1.42 mmol) was added. The mixture 15 was then stirred at room temperature overnight, diluted with lD% ammonium chloride and extracted with ethyl -acetate. The dried, concentrated product was chromatographed over silica gel with 6:4 hexane/ethyl acetate to give 128 mg t33%) of the title compound as an 20 oil. NMR indicated the bis(benzyl) substitution.

(ii) (E)-4-[2-n-butyl-1-{(2-chloro~
phenyl)methyl}-lH-imidazol-5-yl]-2,2-bis(benzyl~-3-butenoic acid A solution of ethyl (E)-4-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-S-yl]-2,2-bis(benzyl)-3-butenoate (1~1 mg) in ethanol (5 mL) was heated ~o reflux with 10% sodi~m hydroxide solution (3 mL) for ~ hours.
The ethanol was evaporated, water was added and the aqueous layer was ex~racted with ether. The water layer was acidified to pH 1 with dilute hydrochloric acid solution, extracted with ethyl acetate, dried and concentrated to a solid. ~rrituration with ether provided 75 mg of the white solid hydrochloride salt of the title compound; mp 184-185C.

2 0 ~

1 ExamPle 20 ~E)-4-[2-n-Butyl-1-{(2-chlorophenyl)-methyl~-lH-imidazol-5-yl]-2-methYl 5and -2,2-dimethyl)-3-butenoic Acid These compounds are prepared according to the procedure of Example 19(i,ii) using one or two equivalents of methyl iodide in place of benzyl bromide.

Example 21 (E)-4-t2-n-Butyl-1-~2-chlorophenyl)methyl~-lH-imidazol-5-yl]-2-benzyl-3-butenoic Acid This compound is prepared according to Example l9(i,ii) but using less than one equivalent of benzyl bromide at higher solvent dilution.

ExamPle 22 ~E!E)-5-[2-n-Butyl-~ 2-chlorophenyl)methYl~-lH-imidazol-5-yl]-2,4-Pentadienoic Acid 25(i) ethyl ~E,E)-5-~2-n-butyl-1-{(~-chlorophenyl)methyl}-lH-imidazol-5-yl]-2,4-pentadienoate This compound was prepared according to the procedure of Example l(iv). From 0.83 g (3 mmol) of 2-n-butyl-1-(2-chlorophenyl)methyl-lH-imidazol-S-carboxaldehyde, 0.78 g ~3.75 mmol) of triethyl 4-phosphono-crotonate, 0.108 g (4.5 mmol) of sodium hydride and 10 mL
of glyme was obtained after flash chromatography 511 mg (38%) of the low melting solid ethyl (E,E)-5-[2-n-butyl-1-{~2-chlorophenyl~methyl}-1H-imidazol-5-yl]-2,4-pentadienoate.

2 ~1~ 41~ ~

- 1 (ii) ~E,E)-5-[2-n-butyl-1-{(2-chloro-phenyl)methyl}-lH-imidazol-5-yl]-2,4-pentadienoic acid This compound was prepared according to the 5 procedure of Example l(v) using ethyl (E,E)-5-~2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazoi-5-yl]-2,4-pentadienoate in place of ethyl (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-methyl-2-propenoate. The title compound was a white solid, ~ obtained in 75~ yield; mp 219-220C.

Example 23 (E)-3-[2-n-ButYl-1-{(2-chlorophenYl)methYl~-lH-imidazol-5-yl]-2-benzyl-2-butenoic Acid (i) Ethyl 2-benzyl-3-trifluoro-methanesulfonyloxy-2-butenoate This compound was prepared according to the ~ procedure of Example 16(i) using ethyl 2-benzyl-acetoacetate in place of ethyl 3-ketoheptanoate. The title compound was obtained in 8~% yield and NMR (NOE) showed one isomer in a trans relationship of benzylic to methyl groups.

(ii) ethyl (E)-3-[2-n-butyl-1-{(trimethyl-silyl)ethoxymethyl}-lH-imidazol-5-yl]-2-benzyl-2-butenoate This compound was prepared according to the procedure of Example 16(ii) by using ethyl 2-benzyl-3-trifluoromethanesulfonyloxy-2-butenoate in place of ethyl 3-trifluoromethanesulfonyloxy-2-heptenoate. The title - compound was obtained in 28% yield and is an oil.

~ 2018~

- 1 (iii) ethyl (E)-3-[2-n-butyl-1-{(2-chloro-phenyl)methyl}-lH-imidazol-5-yl]-2-benzyl-2-butenoate The procedure of Example 11, Method B(iv,v) was followed using ethyl (E)-3-[2-n-butyl-1-{(trimethyl-silyl)ethoxymethyl}-lH-imidazo1-5-yi]-2-benzyl-2-butenoate in place of benzyl(E)-3-~2-n-butyl-1-{(trimethylsilyl)ethoxymethyl}-lH-imidazol-5-yl]-2-propenoate. The title compound was obtained in 57%
10 overall yield from the SEM-derivative.

(iv~ (E)-3-t2-n-butyl-1-{(2-chloro-phenyl)methyl}-lH-imidazol-5-yl]-2-benzyl-2-butenoic acid A solution of ethyl (E)-3-t2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-benzyl-2-bu~enoate (623 mg, 1.38 mmol) in ethanol (25 mL) under argon was treated with 10% sodium hydroxide solution (20 mL), and ~hen stirred for 1 hour at room temperature. An 20 additional 25 mL of 10% sodium hydroxide were added and the mixture was stirred overnight at ambient temperature.
Acidification to pH 4 with dilute hydrochloric acid solution followed by extraction with methylene chloride and washing with water gave after drying and workup, 630 25 mg of crude product. Trituration with ethyl acetate/ether provided the title compound (302 mg, 52%), mp 206-207C, as the white hYdrochloride salt.

Example 24 3~
2-n-ButYl-1-[(2-chlorophenyl)methyl]-B-methYlene-a-(benzyl)-l~-imidazole-5-propanoic Acid A solution of (Z)-3-~2-n-butyl-1-{(2-chloro-phenyl)meth~l}-lH-imidazol-s-yl]-2-benzyl-2-butenoic acid (200 mg) in ethanol (15 mL) was treated with sodium 7 20~ 8~,3 1 hydroxide solution. The crude product was triturated with methanol/ether to provide 0.115 g of the deconjugated acid, 2 n~butyl-l-[(~-chlorophenyl)methyl]-B-methylene-a-(benzyl)-lH-imidazole-5-propanoic acid; mp lÇ9-171C.
s Example ~5 ~E)-3-[2-n-Bu_y~=l-{(2-chlorophenyl)methyl~-lH-imidazol-5-yl]-2-(benzyl)-2-propenoic Acid, 102-(N,N-Diethylamino)-2-oxoethyl Ester A solution of (E)-3-~2-n-butyl-1-{(2-chloro-phenyl)methyl}-lH-imidazol-5-yl]-2-(benzyl)-2-propenoic acid (Example 2) (2.05 g, s mmol) in dry dimPthylformamide 15 (10 mL) was treated with 2-chloro-N,N-diethylacetamide (0.825 g, 5.51 mmol) followed by powdered potassium carbonate. This mixture was heated at 70OC for 7 hours, diluted with water and extracted with ethyl acetate. The water-washed, dried, concentrated product solidified and 20 after trituration with ether/hexane afforded 2.04 g (78%) of the title ester; mp 76-77C.

Example 26 (E ? -3-~2-n-Butyl-1-~(2-chlorophenyl)-me~hyl~-4-hy~dro~ymethYl-lH-imidaz_1-5-yl]-2-benzyl-2-ProPenoic acid ~i) 2-n-butyl~ 2-chlorophenyl)methyl-304-St-butyldimethylsilyloxy)methyl-lH-imidazol-5-carboxaldehyde A solution of 2-n-butyl-1-(2-chlorophenyl)methyl-4,5-bis(hydroxy)methyl-1H-imidazole (Example l(ii)) (310 mg, 1 mmol) in methylene chloride (5 mL) was treated with 4-dimethylaminopyridine ~5.2 mg), triethylamine (1.5 mmol) and t-butyl dim~thylsilyl chloride (192 mg, 1.24 mmol).

J ~ k 3 The mixture was stirred at 25C for 20 hours, diluted with water and the organic layer was washed well with water, dried, concentrated and chromatographed over silica gel with an ethyl acetate/methanol gradient to afford 127 mg (24%) of the bis (4,5-t-butyldimethylsilyl) ether and 252 mg (59%) of 2-n-butyl-1-(2-chlorophenyl)methyl-4-t-butyldimethylsilyloxymethyl-5-hydroxymethyl-lH-imidazole.
This monoether (252 mg) was oxidized to the 5-carbox-aldehyde, using manganese dioxide as described in Example 10 l(iii) to provide 170 mg of 2-n-butyl-1-(2-chlorophenyl)-methyl-4-(t-butyldimethylsilyloxy)methyl-lH-imidazol-5-carboxaldehyde as an oil.

(ii) ethyl (E)-3-[2-n-butyl-1-{(2-chloro-phenyl)methyl}-4-(t-butyldimethyl-silyloxy)methyl-lH-imidazol-5-yl]-2-benzyl-2-propenoate In tetrahydrofuran (80 mL) was added n-butyl lithium (15~5 mmol in hexane) and at -78C under argon was 20 then added.diisopropylamine (2.4 mL, 17.1 mmol). Ethyl 3-ph~nylpropanoate (2.7 mL, 15.3 mmol) was added neat over 5-6 minutes, and the mixture was stirred an additional 30 minutes at -78C. A solution of 2-n-butyl-1-(2-chloro-phenylmethyl-4-(t-butyldimethylsilyloxy)methyl-lH-imidazol-5-carboxaldehyde (4.29 g, 10.2 mmol) in tetrahydrofuran (10 mL) was added via a cannula, and the reaction mixture was stirred for 15 minutes. The reaction was partitioned between saturated ammonium chloride and ether, and the ether layer was washed with water, dried and concentrated to 7.4 g of crude product. This was chromatographed over silica gel with 20-50% o~ ethyl acetate in hexane to afford 5.S2 g ~90%) of a mixture of isomeric ~-hydroxy-ester products. A solution of 5.12 g (8.54 mmol) of this mixture in methylene chloride (100 mL) was treated with 35 .4-dimethylaminopyridine (371-mg, ~.mmol~ fo~lowed by acetic anhydride (g mL, 84 mmol), and the solution was 2 ~ 3 1 stirred a~ room temperature for 5 hours. The reaction was poured into water, stirred for 20 minutes and the product was extracted into ether. The ether extracts were washed with dilute hydrochloric acid solution, water, sodium bicarbonate solution and brine. The dried, concentrated mixture of B-acetoxyester products was used directly in the elimination reaction. To a solution of 2.9 g (4.5 mmol) o the B-acetoxyester product in toluene (60 mL) was added 1.7 mL (10.9 mmol) of 1,8-diazabicyclo[5.4.0]-10 undec-7-ene (DBU), and the mixture was heated at 90C for 24 hours. The reaction was concentrated ~o 10 mL, diluted with ether and flash filtered through a 14 x 3 cm plug of silica gel with ether rinses to afford 2.6 g (99%) of ethyl SE)-3-~2-n-butyl-1-{(2-chlorophenyl)methyl}-15 4-t-butyldimethylsilyloxymethyl-lH-imidazol-5-yl]-2-benzyl-2-propenoate. The elimination of the acetate with DBU produced predominately the trans (E) isomer.

(iii) (E)-3-[2-n-butyl-1-{(2-chlorophenyl)-methyl}-4-hydroxymethyl-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid A solution of ethyl (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-4-t-butyldimethylsilyloxy-methyl-lH-imidazol-5-yl]-2-benzyl-2-propenoate (167 mg, 0.287 mmol) in absolute ethanol (3 mL) was treated portionwise at 6 hour intervals with 10% sodium hydroxide solution (3 x 1 mL). After being stirred overnight at 25C, the reaction was heated to 50C for 4 hours, then concentrated in vacuo. The residual product was taken up in water, acidified to pH 5-6 and extracted with methylene chloride. The isolated, dried, concentrated product was triturated with methanol/ether to provide 78 mg (62%) of the title compound; mp 176-179C (d).

2 ~ 1 8 ~ ~ ~

1 Exam~le 27 (E)-3-[2-n-Butyl-1-{(2-chlorophenyl)-methYl~-lH-imidazol-S-yl]-2-(3,4-Smethylenedioxyphenyl)meth~1-2-propenoic Acid (i) methyl-3-[2-n-butyl-1-(2-chlorophenyl~-methyl-lH-imidazol-5-yl]-3-hydroxy-2-(3,4-methylenedioxy~henyl)methylpropanoate 10In tetrahydrofuran (20 mL) was placed diisopropyl-amine (1.41 mL, 10.0 mmol). The mixture was cooled to 0C
under argon and in n-butyl lithium (4 mL of 2.5 M in toluene, 10.08 mmol) was added. The reac~ion was stirred at 0C for O.S hour, then cooled to -78C. A solution of 15 methyl 3-(3,4-methylenedioxyphenyl)prop~noate (2 g, 9.6 mmol) (prepared by reaction of 3,4-methylenedioxybenz-aldehyde with trimethyl phosphonoacetate in the presence of sodium hydride in ethylene glycol dimethyl ether, followed by cataly~ic hydrogenation with 10% palladium on 20 carbon at 3 atmospheres of hydrogen in an ethyl acetate -solution) in tetrahydrofuran (15 mL) was added, and the mixture was stirred at -78C for 1 hour. A solution of 2-n-butyl-1-(2-chlorophenyl)methyl-lH-imidazol-5-carbox-aldehyde (2.49 g, 9 mmol) in tetrahydrofuran was added, 25 and the mixture was stirred for 30 minutes at -78C. The reaction was ~uenched with ammonium chloride solution, and - the product was extracted into ethyl acetate. The concentrated product was flash chromatographed with 6:4 e~hyl acetate/hexane to yield 1.33 g (31%) of the title compound as an oil, (ii) methyl 3-acetoxy-3-[2-n-butyl-1-(2-chloro-phenyl)methyl-lH-imidazol-5-yl]-2-(3,4-methylenedioxyphenyl)methylpropanoate 35A solution of methyl 3-[2-n-butyl-1-1(2-chloro-phenyl)methyl-lH-imidazol-s-yl]-3-hydroxy-2-(3,4-methlyene-2 ~

1 dio~yphenyl)me~hylpropanoate (1.33 g, 2.7 mmol) in methylene chloride (20 mL) was treated with 4-dimethy'-aminopyridine (91 mg, 0.9 mmol) and acetic anhydride (2.5 mL~, and the mixture was stirred for 4 hours at 25C.
5 Water (s mL) was added, the mixture was stirred for 1 hour, diluted with sodium bicarbonate solution and the organic layer was washed with water, dried and concentrated to 1.36 g (96%) of the title acetoxy derivative as an oil.
(iii) methyl (E)-3-[2-n-butyl-1-1-{(2-chloro-phenyl)methyl}-lH-imidazol-5-yl]-2-(3,4-methylenedioxyphenyl)methyl-2-propenoate A solution of methyl 3-acetoxy-3-[2-n-butyl-1-15 (2-chlorophenyl)methyl-lH-imidazol-5-yl]-2-~3,4-methylene-dioxyphenyl)methylpropanoate (1.36 g, 2.58 mmol), 1,8-diazobicyclot5,4,0]undec-7-ene (1 mL, 6.48 mmol) and toluene (10 mL) was heated at 90 C for 18 hours under argon. The cooled reaction mixture was diluted with ~ ether, the solution was filtered and the filtrate was concentrated. Chromatography of the product over silica gel with a gradient of ethyl acetate in hexane provided 1.1 g (87%) of methyl (E)-3-[2-n-butyl-1-{(2-chloro-phenyl)methyl}-lH-imidazol-5yl]-2-(3,4-methylene-25 dioxyphenyl)methyl-2-propenoate as a low melting solid whose NMR showed the E or trans relationship of the ester group to the imidazole ring.

(iv) (E)-3-[2-n-butyl-1-{(2-chlorophenyl)-methyl}-lH-imidazol-5-yl]-2-(3,4-methylene-dioxyphenyl)methyl-2-propenoic acid The ~itle compound was prepared by the methods described above, by aqueous basic hydrolysis of the ester to provide from 1.~ g of the ester, 0.6 g ~51%), m.p.

2 l~

1 Examples 28-31 In Table II are listed other examples of alkenoic acids ~repared by the methods described in Example 27 (i-iv). The starting materials and products are shown in Table II.

" 20~8!~r~

~ ~ e X b~

~ ~ O
u .
~ c~

b_ 7 R _ b_ z~ O

~1 `l l -'I

; 2 ~

Example 32 (E)-3-~2-n-Butyl-l-r(2-chlorophenYl)~-methyl-4-fluoro-lH-imidazol-5-yl]-2-benzyl-2-propenoic Acid By the procedure of Example 29 (i-iv) using 2-n-butyl-1-(2-chlorophenyl)methyl-4-fluoro-lH-imidazol-S-carboxaldehyde and methyl 3-(benzyl)propanoate as the 10 starting materials, the title compound is prepared.
The sodium salt of the acid is isolated from the basic (10% sodium hydroxide) reaction mixture prior to neutralization with dilute acid. The crude reaction solution is applied to a reverse-phase flash column 15 equilibrated with water. The inorganics are washed from ~he column with water ~3 void volumes) and then the product is eluted with a 50:50 mixture of acetonitrile in water. The acetonitrile is removed in vacuo and then the desired sodium salt is obtained after lyophilization.
Example 33 (E)-3-[2-n-ButYl-1-~(2-chlorophenyl)-methyl~-4 bromo-lH-imidazol-5-yl]-2-(benzyl)methyl-2-propenoic Acid - By the procedure of Example 34 using the corresponding 4-bromo starting material, the title compound is-prepared.

,3 1 ExamPle 34 (E)-3-t2-n-ButYl-1-~(2-chlorophen~l)methY1~4-trifluoromethYl-lH-imidazol-5-Yl]-2-(3,4-methYlenedioxyphenyl)methyl-2-propenoic Acid Using 2-n-butyl-1-(2-chlorophenyl)methyl-4-trifluoroethyl-lH-imidazol-5-carboxaldehyde (prepared by treating the corresponding 4-bromo compound with 10 trifluoromethyl iodide and copper) in the procedure of Example 27 gives the title compound.

Example 35 By the procedure of Example 1~ using in place of 2-chlorobenzyl bromide, the following:
2-methylbenzyl bromide, 3-methoxybenzyl bromide, 4-phenylbenzyl bromide, and 4-methoxy-3-methylbenzyl bromide;
and using the phosphonopropionate of Example 6, (Meo)2p(o)cH(cH2c6H4-p-oMe)-cooMe~ the following products are obtained:
(E)-3-[2-n-butyl-1-{(2-methylphenyl)methyl}-lH-imidazo1-5-yl]-2-(4-methoxyphenyl)methyl-2-propenoic acid, (E)-3-[2-n-butyl-1-{(3-methoxyphenyl)methyl}-lH-imidazol-5-yl]-2-(4-methoxyphenyl)methyl-2-propenoic acid, (E)-3-[2-n-butyl-1-{(4-phenylphenyl)methyl}-lH-imidazol-5-yl]-2-(4-methoxyphenyl)methyl-2-propenoic acid, and (E)-3-[2-n-butyl-1-[(4-methoxy-3-methylphenyl)-methyl] lH-imidazol-5-yl]-2-(4-methoxyphenyl)methyl-2-propenoic acid.

~ 2 ~

1 Example 36 By the procedure of Example 1, using in place of 2-chlorobenzyl bromide, the following:
4-methoxybenzyl bromide, and 4-methoxy-3-methylbenzyl bromide and using the phosphonopropionate of Example 2, (MeO2P(O)CH(CH2C6H5)COOMe, the following products are obtained:
(E)-3-~2-n-butyl-1-{(4-methoxyphenyl)methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid, and (E3-3-[2-n-butyl-1-{(4-methoxy-3-me~hylphenyl)-methyl~-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid.

ExamPle 37 5E)-3-[2-(1-Butenyl)-1-{(2-chloro~henyl)-methYl}-lH-imidazol-5-yl]-2-(3,_-dimethoxy-phenyl)methYl-2-propenoic Acid A mixture of 2-n-butyl-1-(2-chlorophenyl)methyl-lH-imidazol-5-carboxaldehyde and N-bromosuccinimide in carbon tetrachloride is irradiated to give the 2-(1-bromobutyl)-imidazole which is dehydrobrominated by treating 1,8-diaza-25 bicyclo[4.5.0]undec-1-ene in tetrahydrofuran to give 2-(1-butenyl)-1-(2-chlorophenyl~methyl-lH-imidazol-5-carboxaldehyde.
Using the above prepared intermediate and the phos-- phonopropionate of Example 6 in the procedure of Example 1 gives the title compound.

2 ~

1Example 38 (E)-3-[2-Phenyl-l- r ( 2-chlorophenYl, -methyl~-lH-imidazol-5-yl]-2-(3,4-dimethoxy-Sphenyl)methYl-2-propenoic Acid By the procedure of Example l(ii) ~ethod B, using benzamidine methyl ether in place o~ valeramidine methyl ether, 2-phenyl-5-hydroxymethylimidazole is prepared and 10 converted to 2-phenyl-1-(2-chlorophenyl)methyl-5-hydroxy-methyl-lH-imidazole. The 5-hydroxymethyl group is oxidized using manganese dioxide by the procedure of Example 1 (iii). The resulting 2-phenyl-1-(2-chlorophenyl)methyl-lH-imidazol-5-carboxaldehyde is used in the procedure of 15 Example 27 with methyl 3-(3,4-dimethoxyphenyl)propanoate to give the ti~le compound.

Exam~le 39 20 By the procedure of Example 38 using the following amidine me~hyl ethers:
CloH21C=NH(OCH3) and C2H5C=NH(OCH3);
the following products are obtained:
25(E)-3-[2-decyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-(3,4-dimethoxyphenyl)methyl-2-propenoic acid and (E)-3-~2-ethyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-(3,4-dimethoxyphenyl)methyl-2-propenoic acid.

Example 40 (E)-3-[2-n-ButYl-1-{(2-chlorophenyl)methyl~-4-35formyl-lH-imidazol-5-yl]-2-benzy1-2-pro~enoic Acid The title compound was prepared in ~wo steps from the dilute HCl hydrolysis of the 4-t-butyl-dimethylsilyloxy ~i 2()1~4~

1 group of ethyl 3-t2-n-butyl-1-{(2-chlorophenyl)-methyl-4-t-butyldimethyl-silyloxy)methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoate, prepared as in Example 28, followed by manganese dioxide oxidation of the 4-hydroxymethyl group to ~he carboxaldehyde; mp 187-1~8C.

Example 41 3-[1-(2-(1-Adamantyl)ethyl-2-n-butyl-lH-imidazol-5-yl]-2-(4-methoxY
phenyl~methy1-2-propenoic Acid A mixture of 2-(1-adamantyl)ethanol (10.7 g) and diisopropylethylamine (11 ml) in methylene chloride (70 ml) 15 was added to triflic anhydride (16.75 g) in 70 ml of methylene chloride at -78C under argon. After stirring the mixture at -78C for 45 minutes, 1-acetyl-2-n-butyl-S-(acetoxymethyl)imidazole in 50 ml of methylene chloride was added and the mixture was allowed to s~and at room 20 temperature for 4 days, then concentrated and heated on a steam bath with 10% sodium hydroxide (250 ml), diluted with 300 ml of water extracted with methylene chloride, dried, filtered and concentrated to give an oil. Chromatography (silica gel) in methanol-chloroform gave 5-acetoxy-methyl-1-t2-(1-adamantyl)ethyl]-2-n-butylimidazole.
The above prepared compound (5.4 g) was stirred at room temperature with potassium hydroxide (5.2 g) in ethanol (200 ml) for one hour. The mixture was concen-trated, poured into water, stirred and filtered to give 1-~2-(1-adamantyl)ethyl]-2-n-butyl-5-hydroxyme~hylimidazole.
The hydroxymethyl group is oxidized by refluxing the imidazole compound with manganese dioxide in toluene to give l-[2-(1-adamantyl)ethyl]-2-n-butylimidazol-5-carbox-aldehyde.
Diisopropylamine (0.563 g) is covered with S ml of tetrahydrofuran and 2 ml of 2.5 M n-butyl lithium in hexane 2 ~

- 1 is added. The mixture is stirred for 15 minutes and methyl 3-(4-methoxyphenyl)propanoate (0.97 g) is added in 3 ml of tetrahydrofuran. After 20 minutes, 1.04 g of 1-[2~
adamantyl)ethyl]-2-n-butylimidazol-5-carboxaldehyde in 3 ml of tetrahydrofuran is added and the mixture is stirred for 30 minutes at -78C. The mixture is poured into 40 ml of saturated ammonium chloride in water, extracted with ether, dried, filtered, concentrated and chromatographed on silica gel eluting with 70% ethyl acetate-30% hexane to give 10 methyl 3-[1-(2-(1-adamantyl)ethyl)-2-n-butyl-lH-imidazol-5-yl)-3-hydroxy-2-(4-methoxyphenyl)methyl propanoate. This compound is reacted with acetic anhydride in methylene chloride with 4-dimeth~laminopyridine at room temperature to give the corresponding 3-acetoxy compound. The above 15 prepared 3-acetoxy compound in toluene is heated with 1,8-diazobicyco~5,4,0]undec-7-ene by the process of Example 29(iii) to give methyl 3-[1-(2-(1-adamantyl)ethyl)-2-n-butyl-lH-imidazol-S-yl]-2-(4-methoxyphenyl)methyl-2-propenoate.
2~ The ester is hydrolyzed in ethanol using potassium hydroxide to give the title compound.

Example 42 (E2-3 [2-n-ButYl-1-~(2-chloroPhenYl~methyl}-4-carboxy~lH-imidazol-5-yl]-2-benzYl-2-propenoic Acid (E)-3-[2-n-Butyl-1-[(2-chlorophenyl)methyl]-4-hydroxymethyl-lH-imidazol-5-yl]-2-benzyl-2-prop.enoic acid, prepared as in Example 28, is esterified with p-methoxy-benzyl alcohol to give the p-methoxybenzyl propenoate.
The 4-hydroxymethyl group is oxidized using 3Ones reagent in acetone and the ester is hydrolized using 10% sodium hydroxide to give the title compound.

2 ~

1 ExamPle 43 (E)-3-[2-n-ButYl-1-~(2-chlorophenYl)methyl~-4-carbamoyl-lH-imidazol-5-yl]-2-benzyl-2-propenoic Acid p-Methoxybenzyl (E)-3-[2-n-butyl-1-[(2-chloro-phenyl)methyl]-4-carboxy-lH-imidazol-5-yl]-2-benzyl-2-propenoate, prepared as in Example 42, is treated with oxalyl chloride in methylene chloride at 0C to give the 10 4-chloroformyl imidazole which is treated with ammonium hydroxide and the ester is hydrolized to give the title compound.

Example 44 (E)-3-[2-n-Butyl-1-{(4-carboxy-2-chlorophenyl)methyl~-lH-imidazol-S-yl]-.

2-benzyl-2-E~ropenoic Acid 2~ A suspension of 2 butylimidazol-5--aldehyde (16.92 g, 0.111 mmol, prepared by manganesa dioxide oxidation of the alcohol, prepared in Example 1), chloromethyl pivalate (21.77 g, 0.145 mmol), and potassium carbonate (20.07 g, O.145 mmol) in 200 ml of dimethylformamide was stirred at ambient temperature under argon for four days. The solids were removed by filtration and washed with ether. The combined filtrates were part-itioned between e~her and water. The ether phase was washed successively with water and brine, dried over magnesium sulfate and concentrated under vaccum to give 23.6 g of 2-n-butyl-1-pivalyloxy-methylimidazole-5-aldehyde.
A mixture of ethyl 4-bromomethyl-3-chlorobenzoate (5.28 g, 0.020 mmol, U.S. Patent ~o. 4,837,333) and 2-n-butyl-1-pivalyloxymethyl-imidazole-5-aldehyde (4.45 g, 0.0167 mol) was heated at 100C under argon for 18 hours.
Repeated trituration with ether gave 6.38 g of a 2 ~

1 crystalline salt. A suspension of this salt i~ 100 ml of ethyl acetate was stirred ~or 0.5 hours with 100 ml of 5%
aqueous sodium carbonate. The layers were separated, the aqueous layer washed with ethyl acetate, and the combined organic layers washed with water, dried over maghesium sulfate and concentrated to give an oil. Chromatography of this oil over silica gel eluting with ethyl acetate/
hexane (1:1) gave 1.02 g of 2-n-butyl-1-[(4-carboethoxy-2-chlorophenyl)methyl]imidazole-5-aldehyde.
Ethyl 2-carboxy-3-phenylpropiona'ce is pre-pared by stirring a solution of diethyl 2-benzylmalonate and potassium hydroxide in ethanol under argon at room temperature for 12 days and then purifying by removing the solvent under vacuum, dissolving the reside in water, 15 washing the aqueous layer with aqueous hydrochloric acid and with ether.
A solution of this half-acid half-ester in toluene is added to a refluxing solution of 2-n-butyl-1-(4-carboethoxy-2-chlorobenzyl)imidazole-5-aldehyde and 20 piperidine in toluene. Twice at 1 hour intervals an additional amounts of the half-acid, hal~-ester is added, and the solution is then refluxed for 17 hours.
Evaporation of the toluene and chromatography of the residue over silica gel using 2:3 ethyl acetate-hexane for elution gives the diester of the title product. This diester is hydrolyzed in 2:1 ethanol-water with 5 equivalents of potassium hydroxide for 18 hours and ~orked up in the usual manner to give the final product.

Example 45 (E)-3-[2-n-Butyl-1-{(4-carboxyphenyl)methyl~-lH-imidazole-5-yl]-2-benzyl-2-propenoic Acid By the procedure of Example 44 using methyl 4-bromomethylbenzoate in place- o~ ethyl 4-bromomethyl-2-chlorobenzoate, the title compound is prepared.

-6~-l Example 46 (E)-3-[2-n-Butyl-1-~(4-sulfonamidoPhenYl)-methyl~-lH-imidazol-5-yl]-2-benzyl-2-propenoic Acid The procedure of Example 44 is followed using 4-bromomethylbenzenesulfonamide (Braselton, et al., Anal.
Chem., 48, 1386 (1976)) in place of methyl 4-bromomethyl-3-chlorobenzoate to give the title compound.

! ~xample 47 (E)-3-~2-n-ButYl-l-r(4-carboxy-2-nitrophenyl)-methyl}-lH-imidazol-S-yl]-2-benzYl-2-propenoic Acid The procedure of Example 44 is followed using methyl 4-bromomethyl-3-nitrobenzoate (prepared from 4-methyl-3-nitrobenzoic acid by esterification with gaseous hydrochloric acid-methanol followed by methyl 20 bromination with N-bromosuccinimide) to give the title compound.

Example 48 (E)-3-[2-n-ButYl-l-{~4-carboxy-3-chlorophenyl~-methyl~-lH-imidazol-5-yl]-2-benzyl-2-propenoic Acid The procedure of Example 44 is followed using ethyl 4-bromomethyl-2-chlorobenzoate (U.S. Patent No.
4,837,333) in place of ethyl 4-bromomethyl-3-chloro-benzoate to give the title compound.

8~3 - 1 Example 49 (E)-3-1-{(2-Chloro~nYl)methyl~-2-propylthio-lH-imidazol-5-yl]-2-benzyl-2-propenoic Acid (i) 5-carboxymethyl-1-(2-chlorophenyl) methyl-2-thio-lH-imidazole A solution of 2-chlorobenzylamine (14.2 g, 0.1 mol) and triethylamine (13.9 ml, 0.1 mol), in dimethyl-10 formamide (100 ml) was treated with methyl chloroacetate(lO.s g, 0.1 mcl~, and the mixture was heated at 50C for 3.5 hours. The cooled reaction mixture was diluted with ~ther, the solids filtered and the concentrated filtrate was flash chromatographed over silica gel with 6:5 hexane 15 in ethyl acetate to provide 15.3 g (71%) of homogeneous methyl 2-[N-~2-chlorophenyl)methyl]-aminoacetate. This product (15.2 g, 0.071 mol) in mixed xylenes (100 ml) was treated ith 98~ formic acid (2.74 ml, 0.0711 mol) and the mixt~re was refluxed from 2.5 hours with a ~ean-Stark 20 water separator. Evaporation gave 17.1 g (99%) of methyl 2-[N-(2-chlorophenyl)methyl-N-formyl)aminoacetate. This formylated product (17.0 g, 0.071 molJ was dissolved in methyl formate (13.3 ml, 0.216 mol) and added dropwise to a sodium methoxide mixture prepared by adding sodium metal (1.79 g, 0.0778 g-atom) to tetrahydrofuran (325 ml) followed by slow addition of methanol (3.15 ml, 0.0778 mol). The combined mixture was stirred at room tempera-ture for 18 hours, then evaporated to ~ryness. This crude product was dissolved in 50% aqueous methanol (200 ml), treated with charcoal, filtered and the solution was cooled in ice. Concentrated hydrochloric acid followed by a solution of potassium thiocyanate (8.6 g, 0.0~85 mol) in water (20 ml). The mixture was heated in an oil bath held at 90C for 2.5 hours, then cooled to -10C. The precipi-tated solid was filtered, washed with cold ethanol-water and dried at 60C to provide 14.7 g (74%) of 5-carboxymethyl-1-(2-chlorophenyl)methyl-2-thio-lH-imidazole; mp 72-74C.

g l~ ~ 3 1 (ii) 1-(2-chlorophenyl)methyl-5-carboxy-methyl-2-propylthio-lH-imidazole A mixture of 5-carboxymethyl-1-(2-chlorophenyl)-methyl-2-thio-lH-imidazole (2 g, 7.08 mmol, ethyl acetate (20 ml), 5% sodium carbonate solution (40 ml) and propyl bromide (4 ml, 44 mmol) was heated at 60C for 18 hours.
The organic layer was separated, dried over magnesium sul-fate and concentrated to 2.23 g of crude product. Tritura-tion with ether provided 1.63 g (71%) of 5-carboxymethyl-10 1-(2-chlorophenyl)methyl-2-propylthio-lH-imidazole; mp 68-71~ (from hexane).

~iii) E-3-~1-(2-chlorophenyl)methyl-2-propylthio-lH-imidazol-5-yl]-lS 2-be~zyl-2-propenoic acid A solution of 5-carboxymethyl-1-(2-chlorophenyl)-methyl-2-propylthio-lH-imidazole (3.7~ g, 11.5 mmol) in dry tetrahydrofuran (~0 ml) was cooled to -78C under argon, and a solu~ion of diisobutyl alumninum hydride in toluene (30 ml 20 of lM) was added dropwise. The mixture was stirred at -78C
for 1.5 hours, then allowed to slowly warm to room temperature. The reaction was quenched by pouring onto iced dilute acetic acid, the product was extracted into methylene chloride and the organic extracts were washed with water, 5%
~5 sodium carbonate solution and brine. The dried, concentra-ted product was a light tan solid ~3.32 g). Crystallization from ethanol/water gave 1-(2-chlorophenyl)methyl-5-hydroxy-methyl-2-propylthio-lH-imidazole; mp 98-101C.
The title compound is prepared by the procedure of Example l(iii and iv) using 1-(2-chlorophenyl)methyl-5-hydroxymethyl-2-propylthio-lH-imidazole in place of 2-n-butyl-1-(~-chlorophenyl)methyl-5-hydroxymethyl-lH-imidazole.

7 2 ~

1 Ex_mple ~0 (E)-3-[{1-(2-Chorophenyl)methYl~-2-propenylthio-1H-imidazol-5-yl]-2-benzyl-2-proPenoic Acid s The title compound is prepared following the procedure of Example 49 using allyl bromide in place of propyl bromide.

ExamPle 51 (~)-3-[rl-(2-chorophenyl)methyl~-2-pentylthi l imidazol-5-yl]-2-benzYl-2-propenoic acid lS The title compound is prepared following the procedure of Example 49 using l-bromopentane in place of propyl bromide.

Example 52 (E)~3-[~1-52-Chorophenyl)methylL-2-benzylthio-1H-imidazol-5~ _2-benzyl-2-propenoic Acid The title compound is prepared following the procedure of Example 49 using benzyl bromide in place of propyl bromide.

Example 53 - (E)-3-[~1-(2-ChorophenYl)methyl~-2-cyclohexYlthio-lH-im _azol-5-yl]~2-benzyl-2-~roPenoic Acid The title rompound is prepared following the procedure of Example 4g using cyclohexyl bromide in place of propyl bromide.

2 ~ 1 8 ~

l ExamPle 54 (E ? -3-[~1-(2-Chorophenyl)methyl~-2-heptylthio-lH imidazol-S-Yl]-2-benzyl-2-propenoic Acid The title compound is prepared following the procedure of Example 49 using l-bromoheptane in place of propyl bromide.

ExamPle 55 (E?-3-[~1-(2-Chorophenyl)methYll~-2-hexenylthio-lH-imidazol-5-yl]-2-be_zyl-2-Propenoic Acid The title compound is prepared following the procedure of Example 49 using 6-bromo-1-hexene in place of propyl bromide.

ExamPle 56 (E?-3-[rl-(2-Chorophenyl?methyl~-cycloproPylthio-lH-imidazol-5-yl]-2-benzyl-2-propenoic Acid The title compound is prepared following ~he procedure of Example 49 using cyclopropyl bromide in place of propyl bromide.

Example 57 (E~-3-[2-n-Butyl-1-{[2-chloro-4-(lH-tetrazol-5-Yl)phenyl]methyl~ H-imidaæol-5-yl]-2-benzyl-2-propenoic Acid The procedure of Example 42 is followed using t-butyl 4-bromomethyl-3-chlorobenzoate (prepared from 3-chloro-4-methylbenzoic acid by esterification with ~184!~3 1 2-methylpropene in the presence of concentrated sulfuric acid, followed by bromination with ~-bromosuccinimide) in place of ethyl 4-bromomethyl-3-chlorobenzoate to give ethyl (E)-3-[2-n-butyl-1-{[2-chloro-4-(carbo-t-butoxy)phenyl]-methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoate. The t-butyl ester is removed with trifluoroacetic acid.
To a suspension of ethyl (E)-3-[2-n-butyl-1-{(2-chloro-4-carboxyphenyl)methyl}-lH-imida~ol-5-yl]-2-benzyl-2-propenoate in benzene is added thionyl chloride. The 10 resultant mixture is heated to 50C for 9o minutes, then evaporated to an oily residue. The residue is taken up in hexane and evaporated again. The acid chloride is treated with concentrated ammonium hydroxide and then the reaction mixture is stirred for 16 hours at room temperature. The 15 solid is filtered, washed with water, and dried at 50OC
under vacuum to yield the primary amide derivative.
To a solution o~ dimethylformamide in acetoni~rile is added oxalyl chloride at 0C under argon. After 3 minutes, a solution of the amide prepared above in dimethyl-20 formamide is added via ~ cannula. Five minutes later,pyridine is added; the reaction mixture is stirred for an adaitional 5 minutes at 0C, then partitioned between ethyl acetate and 50% aqeuous ammonium chloride. The ethyl acetate layer is washed with water and brine. The ethyl acetate extract is dried with anhydrous sodium sulfate and evaporated to give the corresponding nitrile derivative.
Tetrahydrofuran is added under argon with stirring to a mixture of the nitrile prepared above and aluminum chloride. Sodium azide is added all at once, followed by a tetrahydrofuran rinse, and the reaction is heated to 65C
for 22 hours, then cooled to room temperature. The reaction mixture is diluted with ethyl acetate and treated with 10 hydrochloric acid solution with vigorous stirring for 5 minutes. The ethyl acetate layer is washed with water and brlne.- The ethyl acetate layer is dried with anhydrous -sodium sulfate and evaporated to gi~e ethyl (E)-3-~2-n-butyl-8~

1 1-{~2-chloro-4-(lH-tetrazol-5-yl)phenyl]methyl~-lH-imidazol-5-yl]-2-benzyl-2-propenoate.
The title propenoic acid compound is prepared from the above ethyl ester by basic hydrolysis using aqueous base in me~hanol.

Example 58 (E)-[2-n-Butyl-~ -niteophenyl)methyl~--lH-imidazol-5-~1]-2-benzYl-2-propenoic Acid The title compound is prepared following the procedure of Example 1 using 2-nitrobenzyl bromide in place of 2-chlorobenzyl bromide.

Example 59 .
(E)-[2-n-Butyl-1-{(3-nitrophenyl)methyl~-lH-imidazol-5-yl]-2-benzYl-2-propenoic Acid The title compound is prepared following the procedure of Example 1 using 3-nitrobenzyl bromide in place of 2-chlorobenzyl bromide.

Example 60 ~ E)-~2-n-Butyl-1-{(4-nitroPhenyl)methYl~-lH-im _ azol-5=Yl]-2-(2-benzyl~-2-propenoic Acid The title compound is prepared following the procedure of Eæample 1 using 4-nitrobenzyl bromide in place of 2-chlorobenzyl bromide.

2 ~ 3 --6g--1 Example 61 (E)-[2-n-Butyl-l-fS2-trifluoromethylphenyl)methyl~-lH-imidazol-S-yl]-~-benzYl 2-proPenoic Acid The title compound is prepared following the procedure of Example 1 using 2-trifluoromethylbenzyl bromide in place of 2-chlorobenzyl bromide.

ExamPle 62 , (E)-[2-n-Butyl-1-{~2,3-dichlorophenyl)methyl~-lH-imidazol-5-yl]-2-benzyl-2-propenoic Acid The title compound is prepared following the procedure of Example 1 using 2,3-dichlorobenzyl bromide in place of 2-chlorobenzyl bromide.

' Example 63 (E)-[2-n-Butyl-1-~(3-methoxy-2-nitrophenyl)methyl~-H_imidazol-5-yl]-2=benzyl-2-propenoic Acid The title compound is prepared following the procedure of Example 1 using 3-methoxy-2-nitrobenzyl bromide in place of 2-chlorobenzyl bromide.

Example 64 (E)-[2-n-Butyl-1-{(2-cyanophenyl)methyl~-lH-imidazol-5-yl]-2- ~ Eæ openoic Acid The title compound is prepared following the procedure of Example 1 using 2-cyanobenzyl bromide in place of 2-chlorobenzyl bromide.

~' 2~1~a~3 1 ExamPle 65 (E)-[2-n-ButYl-1-{(4-methoxY-3-methyl)methYl~-H-imidazol-5-yl]-2-benzyl-2-proPenoic Acid The title compound is prepared following the procedure of Example l using 4-methoxy-3-methylbenzyl bromide in place of 2-chlorobenzyl bromide.

Example 66 (E)-t2-n-Butyl-1-{(3-methoxyphenYl)methYl~-lH-imidazol-5-yl]-2-benzYl-2-propenoic Acid The title compound is prepared following the procedure of Example l using 3-methoxybenzyl bromide in place of 2-chlorobenzyl bromide.

Example 67 (E)-[2-n-ButYl 1-~(2-methoxYphenyl))meth~l~-lH-imida~c~-~s-y~=2-benzyl-2-propenoic Acid The title compound is prepared following the procedure of Example 1 using 2-methoxyben7yl bromide in place of 2-chlorobenzyl bromide.

Example 68 (E)-[2-n-ButYl-1-{(2-hydroxyphenyl)methYl~-lH-imidazol-5-~1]-2-benzYl-2-propenoic Acid The title compound is prepared from the 2-methoxy compound prepared in Example 67 using boron tribromide in methylene ch~oride.

2~8~3 1 ExamPle 69 (E)-3-[2-n-HexYl-1-{54-carboxYphenYl)-methyl~-lH-imidazol~ -2-benzyl-2-Propenoic Acid The title compound is prepared following the procedure of Example 1, using n-hexyl iodide in place of n-butyl iodide and using 4-carbomethoxybenzyl alcohol in place of 2-chlorobenzyl alcohol.

Example 70 (E)-3-~2-n-PropYl-1-{(2-nitrophenyl)methyl~-lH-imidazol-5-yl]-2-benzyl-2-proPenoic Acid The title compound is prepared following the procedure of Example 1 using n-propyl iodide in place of n-butyl iodide and 2-nitrobenzyl alcohol in place of 2-chlorobenzyl alcohol.
Example 71 (E)-3-[2-n-Butvl-1-~(4-phenYlphenYl)methYl~-- lH-imidazol-5-yl]-2-benzvl-2-E~oE~enoic Acid 2~
The title compound was prepared following the procedure of Example 1 replacing 2-chlorobenzyl bromide with 4-phenylbenzyl bromide; mp 198-200C.

Exa ple 72 (E)-3-[2-n-Butyl~ (2-phenylphenyl)methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoic Acid The title compound was prepared following the procedure of Example 1 replacing 2-chlorobenzyl bromide with 2-phenylbenzyl bromide; mp 221-224C.

Ci 2 ~

1 ExamPle 73 (E)-3-[2-n-Butyl-1-{(2-chlorophenyl)methyl~-lH-imidazol-5-yl]-2-(3-methoxyphenyl)methY1-2-proPenoic Acid The title compound was prepared following the procedure of Example 27 replacing methyl 3-(3,4-methylene-dioxyphenyl)propanoate with methyl-3-(3-methoxyphenyl)-propanoate; mp 173-174C.

Example 74 (E3-3-[2-n-Butyl-1-{(2-chlorophenYl)methyl~-lH-imidazol-5-Yl]-2-(3,4-dihydroxyphenyl)methyl-2-propenoic Acid (E)-3-[2-n-Butyl-1-{(2-chlorophenyl)methyl}-lH-im idazol-5-yl-]-2-(3,4-dimethoxyphenyl)methyl-2-propenoic acid, prepared in Example 28, was treated with boron tribromide in methylene chloride to give the title compound; mp 1~9-133C.
2~ -Exam~le 75 (E)-3-[2-n-Butyl~1-{(2-chloro~henyl)methyl~-lH-imidazo1-5-yl]-2-(4-nitrophenYl?methYl-2-propenoic Acid The title compound was prepared following the procedure of Example 27 replacing methyl (3,4-methylene-dioxyphenyl)propanoate with methyl (4-nitrophenyl)-propanoate; mp 207-208C.

Example 76 (E)-3-~2-n-8utyl-1-{(2-chlorophenyl)methyl~-lH-imidazol-5-Yl]-2-(4-dimethylamino~henyl)methyl-2-p~penoic Acid The title compound was prepared following the procedure of Example 27 replacing methyl (3,4-methyle~e-.

' 2~8~.s~

1 dioxypheny1)propanoate with methyl(~-dimethylaminophenyl)-propanoate; mp 171-172C.

, Example 77 tE)-3-[2-n-Butyl-l-{(2-chlorophenyl)methyl~-lH-imidazo1-5-yl]-2-(4-aminophenYl)methyl-2-propenoic Acid The title compound was prepared following the 10 procedure of Example 27 replacing methyl (3,4-methylene-dioxyphenyl)propano,ate with methyl (4-aminophenyl)-propanoate; mp 191-192C.

Example 78 (E?-3-~ (2-Chloropheny )me~h,ll ~ ~henyl-lH-imidazol-5-yl]-2 ~enzyl-2-Propenoic Acid ~he title compound was prepared following the 20 procedure of Example 1, replacing n-butyl iodide with phenyl bromide; mp 211-213C.

Example 79 (E)-3-~2-n-Butvl-1-{(2-chlorophenyl)-methyl~-lH-imidazol-5-yl]-2-[1-phenYl-l-phenylmethyl]-2-proPenoic Acid The title compound is prepared using the procedure of Example 27, replacing methyl 3-(3,4-methylene-dioxyphenyl)propanoate with methyl 3-phenyl-3-phenyl-propanoate ~following the procedure descri~ed in Tetra. 44 (7) 2~55 (1988)].

8 ~

1Example 80 (E)-3-t2-n-Butyl-1-{(2-chlorophenYl)methYl~-lH-imidazol-- 5-y1-2-[2-phenYl-2-phenylethyl]-2-proPenoic Acid s The title compound is prepared using the procedure of Example 27, replacing methyl 3-(3,4-methylenedioxY-phenyl)propionate with methyl 3-phenyl-4-phenylpropanoate ~following the procedure described in Tetra. 44 (7) 2055 I (1988)], Example 81 (E)-3-[2-n-Butyl-1-{(2-chlorophenyl)methyl~-lH-lS imidazol-5-yl]-2-{-1-phPnylpentyl~-2-propenoic Acid The title compound-is prepared using the procedure of Example 27 replacing 3-(3,4-methylenedioxyphenyl)-propionate with methyl 3-phenylhep.tanoate.

Example 82 E-3-~2-n~ButY1-1-~2-carboxy~,henyl)methyl}-lH-imidazol-5-yl]-2-benzyl-2-Propenoic Acid The title compound is prepared using the procedure - of Example 44 replacing ethyl 4-bromomethyl-3-chlorobenzoate - with ethyl 2-bromomethylbenzoate.

Example 83 E-3-[2-n-ButYl-1-{(3-carboxyphenyl)methYl~-lH-imidazol-5-yl]-2-benzyl-2-propenoic Acid The title compound is prepared by the procedure of Example 27 using 2-n-butyl-1-~4-carbomethoxyphenyl)methyl]-~i 2 0 ~ 3 1 imidazole-5-aldehyde, prepared by the method described for the preparation of 2-n-butyl-1-[(4-carboethoxy-2-chloro-phenyl)methyl]imidazole-s-aldehyde in Example 44, and methyl 3-phenylpropanoate.

Example 84 (E)-3-[2-n-Bu ~1~ (4-hydroxY-3-methyl~henyl)methyl~-lH-imidazol-5-yl]-2-benzyl-2-propenoic Acid The title compound is prepared by demethylation of (E)-2 n-butyl-1-{(4-methoxy-3-methylphenyl)methyl}-lH-imidazol-5-yl~-2-benzyl-2-propenoic acid, prepared in Example 36, using boron ~ribromide in methylene chloride at 15 room temperature.

Example 85 (E)-3-[2-n-Butyl-l- r (4-carbomethoxYPhenYl)methYl~-20lH-imidazol-5-yl]-2-benzyl-2-propenoic Acid The title compound was prepared using 2-n-butyl-1-[(4-carbomethoxyphenyl)methyl]imidazole-5-aldehyde, prepared by the method described for the preparation of 2-n-butyl-1 [(4-carboethoxy-2-chlorophenyl)methyl]imidazole-5-aldehyde in Example 44, and ~-butyl 3-phenylpropanoate by the procedure of Example 27, excepti instead of basic hydrolysis, trifluoroacetic acid hydrolysis of the t-butyl ester is employed.

Example 86 (E)-3-[2-n-Butyl~ (4-cyanophenyl)met~ -lH-~
imidazol-5-yl~-2-benzyl-2-propenoic Acid ~he ~itle compound is prepared by the procedure of -Example 27, using 2-n-butyl-[(4-cyanophenyl)methyl]-2 0 1 8 ~ ~ ~

l imidazole-S-aldehyde, prepared by the method of Example 42 describing the preparation of 2-n-butyl-1-[(4-carboethoxy-2-chlorophenyl)methyl]imidazole-5-aldehyde, and methyl 3-phenylpropanoate, except, instead of basic hydrolysis of S the ester with sodium hydroxide, potassium carbonate hydrolysis was employed.

Example 87 lO (E)-3-[2-n-Butyl-1-{(4-carbamoylphenyl)methyl~-lH-imidazol-5-yl]-2-benzyl-2-Propenoic Acid Methyl (E)-3-[2-n-butyl-1-{(4-cyanophenyl)-methyl}-lH-imidazol-5-yl~-2-benzyl-2-propanoate, prepared 15 in Example 86, is subjected to hydrolysis with concentrated hydrochloric acid to give the title compound.

Example 88 20 (E)-3-[2-n-Butyl-1-{[4-(lH-tetraol-s-yl)phenyl]-methyl~-lH-imidazol-5-yl]-2-benzyl-2-propenoic Acid The ~itle compound is prepared from methyl (E)-3-[2-n-butyl-1-{(4-cyanophenyl)methyl}-lH-imidazol-255-yl]-2-benzyl-2-propanoate, prepared in Example 86, using the procedure described in Example 57.

Example 89 30~)-3-[2-n-Pro~yl-1-[(4-carboxy~henyl)methyl~-lH
imidazol-5-yl]-2-benzyl-2-propenoic Acid The title compound is prepared using the procedure of Example l r~placing valeramidine methyl ether hydrochloride with butyramidinP methyl ether hydrochloride - 2~ 8~

- 1 and replacing 2-chlorbenzyl alcohol with 4-carbomethoxy-benzyl alcohol.

Example 90 (E)-3-[2-n-Propyl-1-{(2-chlorophenyl)methyl~-lH-imidazol-5-yl~-2-benzyl-2-Propenoic Acid The title compound is prepared using the procedure 10 of Example 1 replacing valeramidine methyl ether hydrochloride with butyramidine methyl ether hydrochloride.

Example 91 (E)-3-[2-n-Hexyl-1-{(2-chlorophenyl)methyl~-lH-midazol-5-yl]-2-benzyl-2-proPenoic Acid The title compound is prepared using the procedure of Example 1 replacing valeramidine methyl ether 20 hdyrochlori~e with caproylamidine methyl ether hydrochloride.

Example 92 (E)-3-~2-n-Buty~ (4-carboxy-2,3-dichlorophenYl)-methyl}-lH-imidazol-5-yl]-2-benzYl-2-propenoic Acid The title compound is prepared using the procedure of Example ~4 replacing ethyl 4~bromomethyl-3-chlorobenzoate with methyl 4-bromomethyl-2,3-dichlorobenzoate (prepared by oxidation of 2,3-dichloro-p-xylene with nitric acid, followed by esterification with methanol/hydrochloric acid and methyl bromoination with ~-bromosuccinimide).

20~L8~

1 ExamPle 93 (E)-3-[2-n-Butyl~ (4-carboxy-2,5-dichlorophenYl)-methyl~-lH-imidazol-5-yl]-2-benzyl-2-propenoic Acid The title compound is prepared using the procedure of Example 44 replacing ethyl 4-bromomethyl-3-chlorobenzoate with methyl 4-bromomethyl-3,6-dichlorobenzo-ate (prepared by oxidation of 2,5-dichloro-p-xylene with 10 nitric acid, followed by esteri~ication with methanol/
hydrochloric acid and methyl bromination with N-bromosuccinimide).

Example 94 1~
(E)-3-[2-n-Butyl-1-{(3-carboxynapthyl)methyl~-lH-i~idazol-5-yl]-2-benzYl-2-propenoic Acid .The title compound is prepared using the 20 procedure of Example 44 replacing ethyl 4-bromomethyl-3-chlorobenzoate with 4-bromomethylcarbomethoxynaphthalene prepared by the oxidation of 1,4-dimethylnaphthalene with nitric acid, followed by esteri~ication with methanol/
hydrochloric acid and methyl bromination with 25 N-bromosuccinimide)-Example 95 (E3-3-[2-n-Butyl-1-{(3-car~oxynaphthyl)methyl~-lH-30i~idazo1-5-yl~-2-benzvl-2-proPenamide (E)-3-[2-n-Butyl-1-{(2,3-dichlorophenyl)methyl-lH-imidazol-5-yl]-2 benzyl-2-propenoic acid, preparçd in Example 62, is treated with thionyl chloride and then ammonium hydroxide, as described in Example 57, to give the title compound.

2 ~

1 Example 96 (E)-3-[2-n-Butyl-1-{(4-carbamoylphenYl)methyl~-lH-. imidazol-5-yl~-2-(2-benzYl)-2-propenamide (E)-3-[2-n-Butyl-l-{(t-carboxyphenyl)methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid, prepared in Example 44, is treated with trifluoroacetic acid, thionyl chloride, and then ammonium hydroxide, as described in 10 Example 57, to give the title compound.

Exam~le 97 (E)-3-[2-n-Butyl-1-{(2-nitroPhenyl)methYl~-lH-15imidazol-5-yl]-2-benzYl-2-propenamide (E)-3-[2-n-Butyl-1 {(2-nitrophenyl)methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid, prepared in Example 58, is treated with thionyl chloride and then ammonium hydroxide, as described in ~xample 57, to give the title compound.

Example 98 E-3~[2-n-Butyl-1-{(2-chloro~henYl)-methyl~-lH-imidazol-5-yl]-2-benzyl-2-Propenoxy Acetic ~cid To a suspension of sodium hydride (2.3 mmol) in 5 mL of glyme is added portionwise (E) 3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol~s-yl]-2-benzyl~2-propenol prepared by the method o~ Example 18(i) from the methyl ester of the compound of Example 2. After stirring for 30 minutes, methyl bromoacetate (2.2 mmol) is added dropwise. The reaction is stirred overnight at room temperature and.then the mixture is poured into 8 l,~ ~ pC, ~80-1 ice~water. The product is extracted into ethyl acetate (3x). The combined organic extracts are washed with water and brine and dried with anhydrous magnesium sulfate. The solvent is removed in vacuo. The residue is chromatographed on silica gel to give the esters of the title compound as an oil.
The ester is saponified by base as described in Example 1.

ExamPl-e 99 (E)-3-[2~n-ButYl~ (2-chlorophenyl)methyl~-1H-imidazol-S-yl]-2-benzYl-2-propenoic Acid To a solution of (E)-3-~2-n-butyl-1-{(2-chloro-phenyl)methyl-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid (1.2 mmol), prepared in Example 1, in tetrahydrofuran (12 mL) is added N-hydroxysuccinimide (1.33 mmol), followed by dicyclohexylcarbodiimide (1.2 mmol) in 5 mL of 20 tetrahydrofuran. The reaction mixture is heated at 3sC
for one hour and then glycine me~hyl ester hydrochloride (1.57 mmol) and triethylamine (1.57 mmol~ are added. The reaction is stirred at room temperature overnight. The mixture is dil~ted with 20 mL of ethyl acetate and the solids are filtered. The filtrate is concentrated to dryness and the residue is chromatographed on silica gel to give the ester-amide aæ an oil.
The ester is saponified to the title acid compound by base hydrolysis, as described in Example 1.
Example 100 (E)-3-~2-n-Butyl-1-~(2-chlor.ophenyl)methYl~-lH-imidazol-5-yl]-2-benzyl-2-propenamide (E)--3-~2-n-Butyl-1-~(2-chlorophenyl~methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid, prepared in ~ 201~

1 Example 2, is treated with ~hionyl chloride and then ammonium hydroxide, as described in Example 57, to give the title compound.

S ExamPle 101 (E)-2-[2-n-Butyl-1-{(2-chlorophenyl)methyl~-lH-imidazol-5-yl]-2-benzYl-2-propenamide (E)-3-~2-n-Butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-benzyl-2-propenoic acid, prepared in Example 61, is treated with thionyl chloride and then ammonium hydroxide, as described in Example 57, to give the title compound.
Example 102 Ethyl (E)-3-~2-n-butyl-1-{(4-carbomethoxyphenyl)-methyl}-lH-imidazol-5-yl]-2-benzyl-2-propanoate The title compound is prepared following the procedure of Example 27 using 2-n-butyl-1-[(4-carbomethoxy-phenyl)methyl]imidazole-5-aldehyde, ~repared by the method described for the preparation of 2-n-butyl-1-[(4-carbo-2S e~hoxy-2-chlorophenyl)methyl]imidazole-5-aldehyde in Example 44, and ethyl 3-(2-thienyl)propanoate.

- Example 103 An oral dosage form for administering orally active Formula (IA) compounds is produced by screening, mixing and filling into hard gelatin capsules the ingredients in proportions, for example, as shown below.

~i f~l8ll~3 1 Inqredients Amounts (E)-3-[2-n-butyl-1-{(2-chlorophenyl)-methyl}-lH-imidazol-5-yl]-2-(4-methoxyphenyl)methyl-2-propenoic acid 100 mg magnesium stearate 10 mg lactose 100 mg Example 104 The sucrose calcium sulfate dihydrate and orally active Formula (I) compounds are mixed and granulated with a 10~ gelatin solution. The wet granules are screened, dried, mixed with the starch, talc and stearic acid, screened and compressed 1nto a tablet.

Inqredients Amounts (E)-3-[2-n-butyl-1-{(2-chlorophenyl)-methyl}-lH-imidazo1-5-yl]-2-(4-methoxyphenyl)methyl-2-propenoic acid 75 mg calcium sulfate dihydrate 100 mg sucrose 15 mg starch 8 mg talc 4 mg stearic acid 2 mg Example 105 ~E)-3-[2-n~Butyl-1-{(2-chlorophenyl)methyl}-lH-imidazol-5-yl]-2-(3,4-methylenedioxyphenyl)methyl-2-propenoic aci~, 50 mg, is dispersed in 25 ml of normal saline to prepare an injectable preparatio~.

' ~lg~ 3 1 ExamPle 106 A topical ophthamological solution for administering Formula (I) compounds is produced by mixing under sterile conditions the ingredients in proportions, for example, as shown below.

Inqredients Amounts (mq/ml) (E)-3-[2-n-butyl-1-[(2-chlorophenyl)methyl]-lH-imidazol-5-yl]-2-(3,4-dimethoxyphenyl)methyl-2-propenoic acid 1.0 dibasic sodium phosphate 10.4 15 monobasic sodium phosphate 2.4 chlorobutanol 5.0 hydroxypropanol methylcellulose5.0 sterile water q.s. ad 1.0 mL
1.0 N sodium hydroxide q.s. ad pH 7.4 It is to be understood that the invention is notlimited to the embodiments illustrated hereabove and the right to the illustrated embodiments and all modifications coming within the scope of the following claims is reserved.

Claims (12)

1. A compound of the formula (I):

(I) in which:

R1 is phenyl, biphenyl, naphthyl, or adamantylmethyl, which are unsubstituted or substituted by one to three substituents selected from Cl, Br, F, I, C1-C4alkyl, nitro, CO2R7, tetrazol-5-yl, C1-C4alkoxy, hydroxy, SC1-C4alkyl, SO2NHR7, NHSO2R7, SO3H, CONR7R7, CN, SO2C1-C4alkyl, or wherein n is 1-3;
R2 is C2-C10alkyl, C3-C10alkenyl, C3-C10alkynyl, C3-C6cycloalkyl, or (CH2)0-8phenyl unsubstituted or substituted by one to three substituents selected from C1-C4alkyl, nitro, Cl, Br, F, I, hydroxy, C1-C4alkoxy or NR7R7;
X is a single bond, S, or O;
R3 is hydrogen, Cl, Br, F, I, CHO, hydroxymethyl, COOR7, CONR7R7, NO2, or CnF2n+1, wherein n is 1-3;
R4 and R5 are independently hydrogen, C1-C6alkyl, phenyl-Y-, or naphthyl-Y-, or biphenyl-Y-, wherein the aryl groups are unsubstituted or substituted by one to three substituents selected from Cl, Br, F, I, C1-C4alkoxy, hydroxy, CO2R7, CN, NO2, tetrazol-5-yl, SO3H, CONR7R7, SO2NHR7, CF3, CONR7R7, C1-C4alkyl, or NR7R7, or by methylenedioxy, phenoxy, or phenyl, except that R4 and R5 are not both selected from hydrogen and C1-C6alkyl;

Y is a single bond, O, S, or C1-C6alkyl which is straight or branched or optionally substituted by phenyl or benzyl, wherein each of the aryl groups is unsubstituted or substituted by halo, NO2, CF3, C1-C4alkyl, C1-C4alkoxy, CN, or CO2R7;
R6 is -Z-COOR8 or -Z-CONR7R7;
Z is a single bond, vinyl, -CH2-O-CH2-, or methylene optionally substituted by C1-C4alkyl, one or two benzyl groups, thienylmethyl, or furylmethyl, or -C(O)NHCHR9-, wherein R9 is H, C1-C4alkyl, phenyl, benzyl, thienylmethyl, or furylmethyl;
each R7 independently is hydrogen, C1-C4alkyl, or (CH2)mphenyl, wherein m is 0-4; and R8 is hydrogen, C1-C6alkyl, or 2-di(C1-C4alkyl)-amino-2-oxoethyl; or R5 and R6 are both hydrogen, R4 is -Z-COOR8 and Z
is other than a single bond; or a pharmaceutically accept-able salt thereof.

2. A compound according to claim 1 in which:
R1 is phenyl unsubstituted or substituted by one to three substituents selected from chloro, fluoro, trifluoromethyl, nitro,methyl, methoxy, hydroxy, sulfonamido, cyano, carboxy, carboC1-C4alkoxy, carbamoyl, or tetrazol-5-yl;
X is a single bond;
R2 is C2-C8alkyl;
R3 is hydrogen, chloro, fluoro, or trifluoromethyl;
R4 is hydrogen or C1-C4alkyl;
R5 is benzyl unsubstituted or substituted by one to three substituents selected from Cl, Br, F, NO2, OCH3, OH, CF3, NR7R7, CH3, or CO2R7, or methylenedioxy;
R6 is COOH; and each R7 independently is H or CH3.

3. A compound according to either claim 1 or 2 which is the E (trans) isomer.

4. A compound according to claim 1 which is (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-

5-yl]-2-benzyl-2-propenoic acid or a pharmaceutically acceptable salt thereof.
5. A compound according to claims 1 which is:
(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(4-methoxyphenyl)methyl-2-propenoic acid or a pharmaceutically acceptable salt thereof;
(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(3,4-dimethoxyphenyl)methyl-2-propenoic acid;
(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(3,4-methylenedioxyphenyl)methyl-2-propenoic acid;
(E)-3-[2-n-butyl-1-{(2-chloro-6-fluorophenyl)-methyl}-1H-imidazol-5-yl-2-benzyl-2-propenoic acid;
(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-4-chloro-1H-imidazol-5-yl]-2-benzyl-2-propenoic acid;
(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(3,4-dihydroxyphenyl)methyl-2-propenoic acid;
(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(2-nitrophenyl)methyl-2-propenoic acid;
(E)-3-[2 n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(4-N,N-dimethylaminophenyl)methyl-2-propenoic acid; or (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(4-aminophenyl)methyl-2-propenoic acid;
or a pharmaceutically acceptable salt thereof.

6. A pharmaceutical composition comprising a pharmaceutically acceptable carrier and a compound of formula (IA):

(IA) in which:

R1 is phenyl, biphenyl, naphthyl, or adamantylmethyl, which are unsubstituted or substituted by one to three substituents selected from Cl, Br, F, I, C1-C4alkyl, nitro, CO2R7, tetrazol-5-yl, C1-C4alkoxy, hydroxy, SC1-C4alkyl, SO2NHR , NHSO2R , SO3H, CONR7R7, CN, SO2C1-C4alkyl, or CnF2n+1, wherein n is 1-3;
R2 is C2-C10alkyl, C3-C10alkenyl, C3-C10alkynyl, C3-C6cycloalkyl, or (CH2)0-8phenyl unsubstituted or substituted by one to three substituents selected from C1-C4alkyl, nitro, Cl, Br, F, I, hydroxy, C1-C4alkoxy or NR7R7;
X is a single bond, S, or O;
R3 is hydrogen, Cl, Br, F, I, CHO, hydroxymethyl, COOR7, CONR7R7, NO2, or CnF2n+1, wherein n is 1-3;
R4 and R5 are independently hydrogen, C1-C6alkyl, phenyl-Y-, naphthyl-Y-, or biphenyl-Y-, wherein the aryl groups unsubstituted or substituted by one to three substituents selected from Cl, Br, F, I, C1-C4alkoxy, hydroxy, CON2R7, CN, NO2, tetrazol-5-yl, SO3H, CF3, CONR7R7, SO2NHR7, C1-C4alkyl, or NR7R7, or by methylenedioxy, phenoxy, or phenyl, except that R4 and R5 are not both selected from hydrogen;

Y is a single bond, O, S, or C1-C6alkyl which is straight or branched or optionally substituted by phenyl or benzyl, wherein each of the aryl groups is unsubstituted or substituted by halo, NO2, CF3, C1-C4alkyl, C1-C4alkoxy, CN, or CO2R7;
R6 is -Z-COOR8 or -Z-CONR7R7;
Z is a single bond, vinyl, -CH2-O-CH2- or methylene optionally substituted by C1-C4alkyl, one or two benzyl groups, thienylmethyl, furylmethyl, or -C(O)NHCHR9-, wherein R9 is H, C1-C4alkyl, phenyl, benzyl, thienylmethyl, or furylmethyl;
each R7 independently is hydrogen or C1-C4alkyl, and R8 is hydrogen, C1-C6alkyl, or 2-di(C1-C4alkyl)-amino-2-oxoethyl; or R5 and R6 are both hydrogen, R4 is -Z-COOR8 and Z
is other than a single bond, or a pharmaceutically acceptable salt thereof.

7. A pharmaceutical composition according to claim 6 in which the compound is:
(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-benzyl-2-propenoic acid or a pharmaceutically acceptable salt thereof;
(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(4-methoxyphenyl)methyl-2-propenoic acid or a pharmaceutically acceptable salt thereof;
(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(3,4-dimethoxyphenyl)methyl-2-propenoic acid;
(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(3,4-methylenedioxyphenyl)methyl-2-propenoic acid;
(E)-3-[2-n-butyl-1-{(2-chloro-6-fluorophenyl)-methyl}-1H-imidazol-5-yl-2-benzyl-2-propenoic acid;

(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-4-chloro-1H-imidazol-5-yl]-2-benzyl-2-propenoic acid;
(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(3,4-dihydroxyphenyl)methyl-2-propenoic acid;
(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(2-nitrophenyl)methyl-2-propenoic acid;
(E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(4-N,N-dimethylaminophenyl)methyl-2-propenoic acid; or (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazo1-5-yl]-2-(4-aminophenyl)methyl-2-propenoic acid;
or a pharmaceutically acceptable salt thereof.

8. A process for preparing a compound of the formula (I) or a pharmaceutically acceptable salt thereof as defined in claim 1, which process comprises:

a) reacting a compound of the formula (II):

(II) wherein R2, R3, and X are as defined in claim 1, and R1' is R1 as defined in claim 1, except that the substituents on the R1' group do not include tetrazol-5-yl, OH, or CO2H, with (C1-C4alkoxy)2P(O)CH(R5)-COOC1-C6alkyl, wherein R5 is as defined in claim 1, in the presence of a base; or b) reacting a compound of the formula (III):

(III) wherein R2, R3, R4, R5, and X are as defined in claim 1, with a compound of the formula (IV):

(IV) wherein W is Cl, Br, F, I, C1-C4alkyl, nitro,-CO2C1-C4alkyl, C1-C4alkoxy, SC1-C4alkyl, CN, SO2C1-C4alkyl, SO2NHR7, NHSO2C1-C4alkyl, or CnF2n+1, n is 1-3, p is 0-3, and R7 is hydrogen, C1-4alkyl, or (CH2)0-4phenyl;
or c) reacting a compound of the formula (II) as hereinbefore defined with a compound of the formula (V):

(V) wherein R5 is as defined in claim 1, in the presence of a base; or d) reacting a compound of the formula (VI):

(VI) wherein R2, R3, R5, and X are as defined in claim 1, R1 is R1 as defined in claim 1, except that the substituents on the R1 group do not include tetrazol-5-yl, OH, or CO2H and R11 is COCH3 or SO2CH3, with a base; or e) reacting a compound of the formula (II) as hereinbefore defined with an appropriate heterocyclic acetic acid in acetic anhydride in the presence of a base;
and thereafter:

(i) for formula (I) compounds in which Z
is -CH2-O-CH2-, reducing the formula (I) ester hereinbefore prepared, followed by reaction with a C1-C6alkyl haloacetate or;

(ii) for formula (I) compounds in which Z is -C(O)NHCHR9- wherein R9 is H, C1-C4 alkyl, phenyl, benzyl, thienylmethyl, or furylmethyl, hydrolyzing the formula (I) ester compounds hereinbefore prepared, followed by reaction with an appropriately substituted amino acid, in the presence of an amide-forming reagent; or (iii) for formula (I) compounds in which Z is a methylene group, reducing the formula (I) ester compounds hereinbefore prepared, followed by reaction with a C1-C6alkyl chloroformate and then reaction with carbon monoxide in the presence of a phosphine ligand; or (iv) for formula (I) compounds in which Z is a methylene group substituted by C1-C4alkyl, benzyl, thienylmethyl, or furylmethyl, reacting the formula (I) ester compounds wherein Z is a methylene group prepared above with a lithium dialkylamide followed by reaction with an alkylating agent, and thereafter where necessary:

(i) for formula (I) compounds in which the R1 group is substituted by hydroxy, deprotecting the formula (I) compounds in which the R1 group is substituted by C1-C4alkoxy; or (ii) for formula (I) compounds in which the Rl group is substituted by carboxy, hydrolyzing the formula (I) compounds in which the R1 group is substituted by CO2C1-4alkyl; or (iii) for formula (I) compounds in which R1 group is substituted by a tetrazol-5-yl group, treating the formula (I) compound in which the R1 group is substituted by carboxy, with a halogenating agent, followed by conversion to the priary amide in a reaction with ammonia, dehydration with oxalylchloride/dimethylformamide and reaction with azide; or (iv) for formula (I) compounds in which R6 is -Z-COOH, hydrolyzing the formula (I) compounds in which R6 is -Z-COOC1-C6alkyl; or (v) for formula (I) compounds in which R6 is -Z-CONR7R7 wherein R7 is hydrogen, C1-C4alkyl, or (CH2)O-4phenyl, treating the formula (I) compounds in which R6 is -Z-COOH with a halogenating agent, followed by reaction with an appropriately substituted amine;
and thereafter optionally forming a pharmaceutically acceptable salt.

9. The use of a compound of the formula (IA) or a pharmaceutically acceptable salt thereof as defined in claim 6 in the manufacture of a medicament for treatment of diseases in which angiotensin II receptor antagonism is a factor.

10. The use of a compound of the formula (IA) or a pharmaceutically acceptable salt thereof as defined in claim 6 in the manufacture of a medicament for treatment of hypertension.

11. The use of a compound of the formula (IA) or a pharmaceutically acceptable salt thereof as defined in claim 6 in the manufacture of a medicament for treatment of congestive heart failure.

12. The use of a compound of the formula (IA) or a pharmaceutically acceptable salt thereof as defined in claim 6 in the manufacture of a medicament for treatment of renal failure.